>FIG. 5 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the top 20 is connected to the sidewall 30 by having an outer perimeter of the top 20 folded down and having an outer surface coating of the top's outer perimeter melted together with an inner surface coating of the sidewall 30. The outer perimeter may be defined as portion of the paperboard near the edge, when the base 10, the top 20 or the sidewall 30 has not yet been connected to the lid 1. The outer perimeter may comprise extensions and shapes suitable for providing connection between abutting surfaces. The folding may be executed by a suitable jig configured to press the paperboard into desired shape. The base 10 is connected to the lid 1 by having an edge surface facing down of the connected top 20 and sidewall 30 coating melted together with an upper coating of the base's outer perimeter. The top 10 provides portion of the sidewall 30, thereby stiffing the structure of the lid 1.

FIG. 6 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the top 20 is connected to the sidewall 30 by having the outer perimeter of the top 20 folded down and having the outer surface coating of the top's outer perimeter melted together with the inner surface coating of the sidewall 30. A bottom portion of the sidewall 30 is folded around an edge of an outer perimeter of the top 20 facing down. In one embodiment, the top 20 is first melted together with the sidewall 30 and the curve around the bottom edge of the top 20. In one embodiment, the curve is pressed to turn around the bottom edge of the top 20 the connection is secured by melting the top 20 melted together with the sidewall 30. The base 10 is connected to the lid 1 by having a sidewall 30 surface coating facing down melted together with an upper portion of an outer perimeter surface coating of the base 10.

FIG. 7 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the base 10 is connected to the sidewall 30 by having an outer perimeter of the base 10 folded down and having an outer surface coating of the base's outer perimeter melted together with the inner surface coating of the sidewall 30. The bottom portion of the sidewall 30 is folded around the edge of the outer perimeter of the base 10 facing down. The top 20 is connected to the lid 1 by having an upper edge of the sidewall 30 rolled and having a sidewall 30 surface coating facing up melted together with a lower outer perimeter surface coating of the top 20.

FIG. 8 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the base 10 is connected to the sidewall 30 by having the outer perimeter of the base 10 folded down and having the outer surface coating of the base's outer perimeter melted together with the inner surface coating of the sidewall 30. The top 20 is connected to the lid 1 by having an upper edge of the sidewall 30 rolled together with an outer perimeter of the top 20.

FIG. 9 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the base 10 is connected to the sidewall 30 by having the outer perimeter of the base 10 folded up and having the outer surface coating of the base's outer perimeter melted together with the inner surface coating of the sidewall 30. The top 20 is connected to the lid 1 by having an upper edge of the sidewall 30 rolled together with an outer perimeter of the top 20.

FIG. 10 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the base 10 is connected to the sidewall 30 by having the outer perimeter of the base 10 folded up and having the outer surface coating of the base's outer perimeter melted together with the inner surface coating of the sidewall 30. The top 20 is connected to the lid 1 by having an upper edge of the base 10 melted together with an outer perimeter of the top 20.

FIG. 11 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the base 10 is connected to the sidewall 30 by having an outer perimeter of the base 10 folded down and having an outer surface coating of the base's outer perimeter melted together with an inner surface coating of the sidewall 30. The bottom portion of the sidewall 30 is folded around the edge of the outer perimeter of the base 10 facing down. The sidewall 30 comprises a rolled upper edge. The sidewall 30 comprises a circumferential extension 31 parallel to the base 10 at a position between the rolled upper edge and the bottom portion. The position may be selected to provide sufficient volume, shape and/or effect to the chamber 14. The top 20 is connected to the lid 1 by having an inner surface coating of the circumferential extension melted together with the outer perimeter surface coating of the top 20.

FIG. 12 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the base 10 is connected to the sidewall 30 by having the outer perimeter of the base 10 folded up and having the outer surface coating of the base's outer perimeter melted together with the inner surface coating of the sidewall 30. The sidewall 30 comprises a rolled upper edge. The sidewall 30 comprises the circumferential extension 31 parallel to the base 10 at a position between the rolled upper edge and the bottom portion. The top 20 is connected to the lid 1 by having the inner surface coating of the circumferential extension melted together with the outer perimeter coating of the top 20.

FIG. 13 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the outer perimeter of the base 10 is folded down, and the outer perimeter of the top 20 is folded down. The inner surface coating of the top's outer perimeter is melted together with the outer surface coating of the base's outer perimeter, wherein horizontal portions of the base 10 and the top 20 are at a distance within each other. The top 20 is connected to the sidewall 30 by having the outer surface coating of the top's outer perimeter melted together with the inner surface coating of the sidewall 30. The bottom portion of the sidewall 30 is folded around the edge of the outer perimeter of the top 20 facing down and the edge of the outer perimeter of the base 10 facing down. In this embodiment, the base 10 and the top 20 provide stiffness to the sidewall 30.

FIG. 14 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the outer perimeter of the base 10 is folded down and the outer perimeter of the top 20 is folded down. The top 20 is connected to the sidewall 30 by having the outer surface coating of the top's outer perimeter melted together with the inner surface coating of the sidewall 30. The base 10 is connected to the sidewall 30 by having the outer surface coating of the base's outer perimeter melted together with the inner surface coating of the sidewall 30.

FIG. 15 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the outer perimeter of the base 10 is folded up and the outer perimeter of the top 20 is folded down, wherein the edges of the base 10 and the top are abutting. The top 20 is connected to the sidewall 30 by having the outer surface coating of the top's outer perimeter melted together with the inner surface coating of the sidewall 30. The base 10 is connected to the sidewall 30 by having the outer surface coating of the base's outer perimeter melted together with the inner surface coating of the sidewall 30.

FIG. 16 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the outer perimeter of the base 10 is folded up. The outer perimeter of the top 20 is folded down and positioned overlapping with the edge of the base 10. The inner surface coating of the top's outer perimeter is melted together with the outer surface coating of the base's outer perimeter, wherein horizontal portions of the base 10 and the top 20 are at a distance within each other. The top 20 is connected to the sidewall 30 by having the outer surface coating of the top's outer perimeter melted together with the inner surface coating of the sidewall 30.

FIG. 17 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the outer perimeter of the base 10 is folded up to form an outer portion of the sidewall 30. The outer perimeter of the top 20 is folded up to form an inner portion of the sidewall 30. The base 10 and the top 20 are connected by having the inner surface coating of the newly formed outer portion of the sidewall 30 melted together with the outer surface coating of the inner portion of the newly formed sidewall 30. In FIG. 17 the upper edges of the base 10 and the top 20 are rolled together. FIG. 18 provides an alternative solution for the upper edges, as in that embodiment the upper edges are folded out.

FIG. 19 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, a first portion of an outer perimeter of the base 10 is folded up to form a lower portion of the sidewall 30. A second portion of the outer perimeter of the base 10 is folded out to form a first horizontal flange 41 to the edge of the base 10. A first portion of an outer perimeter of the top 20 is folded down to form an upper portion of the sidewall 30. A second portion of the outer perimeter of the top 20 is folded out to form a second horizontal flange 42 to the edge of the top 20. The base and the top 20 are connected by having a lower surface coating of the second horizontal flange 42 melted together with an upper surface coating of the first horizontal flange 41.

FIG. 20 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the first portion of an outer perimeter of the base 10 is folded up to form the sidewall 30. The second portion of the outer perimeter of the base 10 is folded out to form the first horizontal flange 41 to the edge of the base 10. The top 20 is flat and disc-shaped, having the lower surface coating of the outer perimeter melted together with the upper surface coating of the first horizontal flange 41.

FIG. 21 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. In this example, the first portion of an outer perimeter of the base 10 is folded up to form the sidewall 30. The top 20 is connected to the lid 1 by having an upper edge of the sidewall 30 rolled together with an outer perimeter of the top 20. Additionally, the coatings may be melted together.

FIG. 22 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. The base 10 is connected to the sidewall 30 by having the outer perimeter of the base 10 folded down. The outer surface coating of the base's 10 outer perimeter is melted together with the inner surface coating of the sidewall 30. The upper edge of the sidewall 30 is rolled. The top 20 is connected to the lid 1 by having the sidewall 30 surface coating facing up melted together with the lower outer perimeter surface coating of the top 20. In this embodiment, the top 20 is flat and disc-shaped.

FIG. 23 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. The outer perimeter of the base 10 is folded down to form the lower portion of the inner portion of the sidewall 30, together with the sidewall 30. The outer perimeter of the top 20 is folded up to form an upper portion of the inner portion of the sidewall 30, together with the sidewall 30. The inner surface coating of the outer portion of the sidewall 30 is melted together with the outer surface coatings of both the upper and lower portions of the inner portion of the sidewall 30. The upper edge of the outer portion of the sidewall 30 and the inner portion of the sidewall are rolled together.

FIG. 24 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. The outer perimeter of the base 10 is folded down to form a lower portion of an inner portion of the sidewall 30, together with the sidewall 30. The outer perimeter of the top 20 is folded up to form an upper portion of the inner portion of the sidewall 30, together with the sidewall 30. The inner surface coating of the outer portion of the sidewall 30 is melted together with the outer surface coatings of both the upper and lower portions of the inner portion of the sidewall 30. The bottom portion of the outer sidewall 30 is folded around the edge of the outer perimeter of the base 10. The folding around the edge reinforces the lower portion of the lid 1.

FIG. 25 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. The outer perimeter of the base 10 is folded down to form the lower portion of the inner portion of the sidewall 30, together with the sidewall 30. The inner surface coating of the outer portion of the sidewall 30 is melted together with the outer surface coating of the inner portion of the sidewall 30. The bottom portion of the outer sidewall 30 is folded around an edge of the outer perimeter of the base 10. The top 20 is connected to the lid 1 by having an upper edge of the sidewall 30 rolled and having the sidewall 30 surface coating facing up melted together with a lower outer perimeter surface coating of the top 20.

FIG. 26 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. The outer perimeter of the base 10 is folded down to form the lower portion of the inner portion of the sidewall 30, together with the sidewall 30. The inner surface coating of the outer portion of the sidewall 30 is melted together with the outer surface coating of the inner portion of the sidewall 30. The bottom portion of the outer sidewall 30 is folded around an edge of the outer perimeter of the base 10. The top 20 is connected to the lid 1 by having an upper edge of the sidewall 30 rolled together with the outer perimeter of the top 20.

FIG. 26 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1. The outer perimeter of the top 20 is folded down to form an inner portion of the sidewall. The inner surface coating of the outer portion of the sidewall 30 is melted together with an outer surface coating of the inner portion of the sidewall. The bottom portion of the outer sidewall 30 is folded around the edge of the outer perimeter of the top 20. The outer perimeter of the base 10 is folded down. The sidewall 30 surface coating facing inside is melted together with the outer perimeter surface coating of the base 10. In this embodiment, the bottom portion of the sidewall 30 comprises four layers.

FIG. 28 illustrates schematically a cross-sectional view of one exemplary embodiment of the lid 1, wherein a horizontal portion of the base 10 is partially connected to a horizontal portion of the top 20. The chamber 14 occupies the lid 1 partially. The chamber 14 may comprise various shapes to further enhance the splash resistance. In FIG. 29 the top 20 is connected to the sidewall 30 diagonally, providing the sectional shape of the chamber 14 to be triangular. The first opening 11 and the second opening 12 are placed at the outer perimeter. The first breather opening 13 and/or the second breather opening 23 are placed at a central region of the chamber 14. The chamber 14 may be shaped to accommodate the first breather opening 13 and/or the second breather opening 23 to a suitable distance from the first opening 11 and the second opening 12.

FIG. 30 illustrates exemplary steps of the method in a flowchart. Step 100 comprises providing coated paperboard. Step 110 comprises forming the base 100. Step 120 comprises forming the top 120 Step 130 comprises forming the sidewall 140. The forming steps comprise cutting the paperboard into suitable shape. Paperboards may be coated on one side or on both sides. The suitable side is selected for each element, the base 10, the top 20 and the sidewall 30. In some embodiments, the sidewall 30 is formed from the base 10 or from the top 20. Step 140 comprises melting coating of at least two connecting or abutting paperboards for connecting the sidewall 30 to the base 10 or to the top 20. Order of the steps may vary in different embodiments.

A lid for a beverage cup is disclosed herein, comprising: a base comprising a first opening; a top comprising a second opening near an edge of the top; a sidewall connected to the circumference of the top and the base; a chamber being defined by the base, the top and the sidewall; and the lid is made of coated paperboard. A beverage is configured to flow from the beverage cup, through the first opening, through the chamber and through the second opening to the user drinking the beverage. The sidewall is connected to the base or to the top by a melted coating of the paperboard. In one embodiment, the lid comprises a vertical axis along the base and the top; and the first opening and the second opening are at different positions along the vertical axis. In one embodiment, the lid comprises a vertical axis along the base and the top; and the first opening and the second opening are partially aligned along the vertical axis. In one embodiment, the chamber comprises an infusion material for the beverage configured to flow though the chamber. In one embodiment, the chamber comprises substance configured to flow through the second opening with the beverage. In one embodiment, the first opening is covered by a first tear-off cover. In one embodiment, the second opening is covered by a second tear-off cover. In one embodiment, the coated paperboard comprises a coated barrier board. In one embodiment, the coated barrier comprises a water-based dispersion coating. In one embodiment, the coating comprises at least one substance from the group of polyethylene, low density polyethylene, biopolyethylene, microfibrillated cellulose, polyhydroxyalkanoate and polylactic acid. In one embodiment, the base comprises a first breather opening at a distal edge from the first opening. In one embodiment, the top comprises a second breather opening at a distal edge from the second opening, near a user's nose when the user is drinking though the lid, configured to allow air to pass through the second breather opening. In one embodiment, the base comprises a mesh configured to allow liquid from the beverage cup to pass through the base. In one embodiment, a horizontal portion of the base is partially connected to a horizontal portion of the top. In one embodiment, an outer perimeter of the top is folded down and a bottom portion of the sidewall is folded around an edge of an outer perimeter of the top facing down. In one embodiment, the top is connected to the sidewall by having an outer perimeter of the top folded down and having an outer surface coating of the top's outer perimeter melted together with an inner surface coating of the sidewall; and the base is connected to the lid by having an edge surface facing down of the connected top and sidewall coating melted together with an upper coating of the base's outer perimeter. In one embodiment, the top is connected to the sidewall by having an outer perimeter of the top folded down and having an outer surface coating of the top's outer perimeter melted together with an inner surface coating of the sidewall; a bottom portion of the sidewall is folded around an edge of an outer perimeter of the top facing down; and the base is connected to the lid by having a sidewall surface coating facing down melted together with an upper portion of an outer perimeter surface coating of the base. In one embodiment, the base is connected to the sidewall by having an outer perimeter of the base folded down and having an outer surface coating of the base's outer perimeter melted together with an inner surface coating of the sidewall; a bottom portion of the sidewall is folded around the edge of the outer perimeter of the base facing down; and the top is connected to the lid by having an upper edge of the sidewall rolled; and having a sidewall surface coating facing up melted together with a lower outer perimeter surface coating of the top. In one embodiment, the base is connected to the sidewall by having an outer perimeter of the base folded down and having an outer surface coating of the base's outer perimeter melted together with an inner surface coating of the sidewall; and the top is connected to the lid by having an upper edge of the sidewall rolled together with an outer perimeter of the top. In one embodiment, the base is connected to the sidewall by having an outer perimeter of the base folded up and having an outer surface coating of the base's outer perimeter melted together with an inner surface coating of the sidewall; and the top is connected to the lid by having an upper edge of the sidewall rolled together with an outer perimeter of the top. In one embodiment, the base is connected to the sidewall by having an outer perimeter of the base folded up and having an outer surface coating of the base's outer perimeter melted together with an inner surface coating of the sidewall; and the top is connected to the lid by having an upper edge of the base melted together with an outer perimeter of the top. In one embodiment, the base is connected to the sidewall by having an outer perimeter of the base folded down and having an outer surface coating of the base's outer perimeter melted together with an inner surface coating of the sidewall; a bottom portion of the sidewall is folded around the edge of the outer perimeter of the base facing down; the sidewall comprises a rolled upper edge; the sidewall comprises a circumferential extension parallel to the base at a position between the rolled upper edge and the bottom portion; the top is connected to the lid by having an inner surface coating of the circumferential extension melted together with an outer perimeter surface coating of the top. In one embodiment, the base is connected to the sidewall by having an outer perimeter of the base folded up and having an outer surface coating of the base's outer perimeter melted together with an inner surface coating of the sidewall; the sidewall comprises a rolled upper edge; the sidewall comprises a circumferential extension parallel to the base at a position between the rolled upper edge and the bottom portion; the top is connected to the lid by having an inner surface coating of the circumferential extension melted together with an outer perimeter coating of the top. In one embodiment, an outer perimeter of the base is folded down; an outer perimeter of the top is folded down; an inner surface coating of the top's outer perimeter is melted together with an outer surface coating of the base's outer perimeter, wherein horizontal portions of the base and the top are at a distance within each other; the top is connected to the sidewall by having an outer surface coating of the top's outer perimeter melted together with an inner surface coating of the sidewall; In one embodiment, a bottom portion of the sidewall is folded around an edge of the outer perimeter of the top facing down and an edge of the outer perimeter of the base facing down. In one embodiment, an outer perimeter of the base is folded down; an outer perimeter of the top is folded down; the top is connected to the sidewall by having an outer surface coating of the top's outer perimeter melted together with an inner surface coating of the sidewall; and the base is connected to the sidewall by having an outer surface coating of the base's outer perimeter melted together with the inner surface coating of the sidewall. In one embodiment, an outer perimeter of the base is folded up; an outer perimeter of the top is folded down; the top is connected to the sidewall by having an outer surface coating of the top's outer perimeter melted together with an inner surface coating of the sidewall; and the base is connected to the sidewall by having an outer surface coating of the base's outer perimeter melted together with the inner surface coating of the sidewall. In one embodiment, an outer perimeter of the base is folded up; an outer perimeter of the top is folded down; an inner surface coating of the top's outer perimeter is melted together with an outer surface coating of the base's outer perimeter, wherein horizontal portions of the base and the top are at a distance within each other; the top is connected to the sidewall by having an outer surface coating of the top's outer perimeter melted together with an inner surface coating of the sidewall. In one embodiment, an outer perimeter of the base is folded up to form an outer portion of the sidewall; an outer perimeter of the top is folded up to form an inner portion of the sidewall; and having an inner surface coating of the outer portion of the sidewall melted together with an outer surface coating of the inner portion of the sidewall. In one embodiment, a first portion of an outer perimeter of the base is folded up to form a lower portion of the sidewall; a second portion of the outer perimeter of the base is folded out to form a first horizontal flange to the edge of the base; a first portion of an outer perimeter of the top is folded down to form an upper portion of the sidewall; a second portion of the outer perimeter of the top is folded out to form a second horizontal flange to the edge of the top; and having a lower surface coating of the second horizontal flange melted together with an upper surface coating of the first horizontal flange. In one embodiment, a first portion of an outer perimeter of the base is folded up to form the sidewall; a second portion of the outer perimeter of the base is folded out to form a first horizontal flange to the edge of the base; and the top is flat and disc-shaped, having a lower surface coating of an outer perimeter melted together with an upper surface coating of the first horizontal flange. In one embodiment, a first portion of an outer perimeter of the base is folded up to form the sidewall; and the top is connected to the lid by having an upper edge of the sidewall rolled together with an outer perimeter of the top. In one embodiment, the base is connected to the sidewall by having an outer perimeter of the base folded down and having an outer surface coating of the base's outer perimeter melted together with an inner surface coating of the sidewall; and the top is connected to the lid by having an upper edge of the sidewall rolled; and having a sidewall surface coating facing up melted together with a lower outer perimeter surface coating of the top. In one embodiment, an outer perimeter of the base is folded down to form a lower portion of an inner portion of the sidewall; an outer perimeter of the top is folded up to form an upper portion of the inner portion of the sidewall; having an inner surface coating of the outer portion of the sidewall melted together with an outer surface coatings of both the upper and lower portions of the inner portion of the sidewall; and having an upper edge of the outer portion of the sidewall and the inner portion of the sidewall rolled together. In one embodiment, an outer perimeter of the base is folded down to form a lower portion of an inner portion of the sidewall; an outer perimeter of the top is folded up to form an upper portion of the inner portion of the sidewall; having an inner surface coating of the outer portion of the sidewall melted together with an outer surface coatings of both the upper and lower portions of the inner portion of the sidewall; and a bottom portion of the outer sidewall is folded around an edge of the outer perimeter of the base. In one embodiment, an outer perimeter of the base is folded down to form a lower portion of an inner portion of the sidewall; having an inner surface coating of the outer portion of the sidewall melted together with an outer surface coating of the inner portion of the sidewall; a bottom portion of the outer sidewall is folded around an edge of the outer perimeter of the base; and the top is connected to the lid by having an upper edge of the sidewall rolled; and having a sidewall surface coating facing up melted together with a lower outer perimeter surface coating of the top. In one embodiment, an outer perimeter of the top is folded down to form an inner portion of the sidewall; having an inner surface coating of the outer portion of the sidewall melted together with an outer surface coating of the inner portion of the sidewall; a bottom portion of the outer sidewall is folded around an edge of the outer perimeter of the top; and the outer perimeter of the base is folded down; and having a sidewall surface coating facing inside melted together with the outer perimeter surface coating of the base.