Spoutless drinking cup

1. A drinking cup comprising:

a receptacle having an open end and comprising a receptacle rim at the open end, the receptacle defining a liquid chamber within the receptacle;

a lid assembly configured for releasable engagement with the receptacle over the open end thereof, the lid assembly comprising a lid assembly wall having an inner surface, and an inner ring extending radially inward from the lid assembly wall, the inner ring defining a plurality of fluid passages, the lid assembly further comprising an annular projection extending axially from the inner ring to a free end of the lid assembly, the annular projection and the inner surface of the lid assembly wall defining a receptacle gap therebetween, the lid assembly configured to receive at least a portion of the receptacle rim within the receptacle gap when the lid assembly is releasably engaged to the receptacle; and

a seal assembly configured to be retained by the inner ring, the seal assembly comprising an upper lip,

wherein the lid assembly and the seal assembly are configured relative to each other such that the seal assembly is resiliently deformable between a sealed configuration and an unsealed configuration, wherein:

in the sealed configuration, the upper lip sealingly engages the inner surface and fluid is prevented from flowing through a lid assembly volume defined between the lid assembly and the seal assembly, and

in the unsealed configuration fluid is permitted to flow from the receptacle, through the plurality of fluid passages, and between a gap defined by a portion of the upper lip and a corresponding portion of the inner surface.

2. The drinking cup of claim 1 , wherein the inner ring comprises a retention lip, the seal assembly defines a retention groove, and the seal assembly is configured to be retained by the inner ring by retaining the retention lip within the retention groove.

3. The drinking cup of claim 1 , wherein the receptacle rim seals against at least one of the lid assembly wall and the annular projection when the lid assembly is releasably engaged to the receptacle.

4. The drinking cup of claim 1 , wherein the fluid passages are radially extending slots distributed about the circumference of the inner ring.

5. The drinking cup of claim 1 , wherein the seal assembly further comprises a plurality of ridges distributed adjacent to the upper lip such that the ridges abut the inner surface and wherein, in the unsealed configuration, the seal assembly resiliently deforms about at least a portion of the ridges.

6. The drinking cup of claim 1 , wherein the seal assembly further comprises a one-way vent feature through which air flows into receptacle during drinking of fluid therefrom in the unsealed configuration.

7. The drinking cup of claim 1 , wherein the seal assembly is resiliently deformable between the sealed configuration and the unsealed configuration by applying force to the seal assembly.

8. A cover assembly for a receptacle having a rim at an open end thereof, the cover assembly comprising:

a lid assembly configured for releasable engagement with the receptacle over the open end thereof, the lid assembly comprising a lid assembly wall having an inner surface, and an inner ring extending radially inward from the lid assembly wall, the inner ring defining a plurality of fluid passages, the lid assembly further comprising an annular projection extending axially from the inner ring to a free end of the lid assembly, the annular projection and the inner surface of the lid assembly wall defining a receptacle gap therebetween, the lid assembly configured to receive at least a portion of the receptacle rim within the receptacle gap when the lid assembly is releasably engaged to the receptacle; and

a seal assembly configured to be retained by the inner ring, the seal assembly comprising an upper lip,

wherein the lid assembly and the seal assembly are configured relative to each other such that the seal assembly is resiliently deformable between a sealed configuration and an unsealed configuration, wherein:

in the sealed configuration, the upper lip sealingly engages the inner surface and fluid is prevented from flowing through a lid assembly volume defined between the lid assembly and the seal assembly, and

in the unsealed configuration fluid is permitted to flow from the receptacle, through the plurality of fluid passages, and between a gap defined by a portion of the upper lip and a corresponding portion of the inner surface.

9. The cover assembly of claim 8 , wherein the inner ring comprises a retention lip, the seal assembly defines a retention groove, and the seal assembly is configured to be retained by the inner ring by retaining the retention lip within the retention groove.

10. The cover assembly of claim 8 , wherein the receptacle rim seals against at least one of the lid assembly wall and the annular projection when the lid assembly is releasably engaged to the receptacle.

11. The cover assembly of claim 8 , wherein the fluid passages are radially extending slots distributed about the circumference of the inner ring.

12. The cover assembly of claim 8 , wherein the seal assembly further comprises a plurality of ridges distributed adjacent to the upper lip such that the ridges abut the inner surface and wherein, in the unsealed configuration, the seal assembly resiliently deforms about at least a portion of the ridges.

13. The cover assembly of claim 8 , wherein the seal assembly further comprises a one-way vent feature through which air flows into receptacle during drinking of fluid therefrom in the unsealed configuration.

14. The cover assembly of claim 8 , wherein the seal assembly is resiliently deformable between the sealed configuration and the unsealed configuration by applying force to the seal assembly.