Patent ID: RE38692

Claim:
A drinking device comprising: a body having an open end and for containing a liquid, and a lid for sealingly closing the open end of the body, said lid having an outlet incorporating a first one-way valve for dispensing a liquid from the body through the outlet, upon application of suction to the outlet, and an inlet incorporating a second one-way valve for air intake to automatically balance internal pressure within the body, sealed with the lid, with external pressure outside the body while a liquid is being dispensed through the outlet, wherein the first one-way valve comprises a chamber having a resiliently deformable wall including a hole in communication with the outlet and a resiliently deformable sleeve , and the lid includes a member extending from the outlet within the sleeve and forming the chamber, the member including an internal duct connecting the outlet to the chamber, and, when the body is sealed with the lid, the first one-way valve is normally closed by pressing of the resiliently deformable wall against an internal surface of the body by resilience of the resiliently deformable wall and the first one-way valve is opened upon application of suction to the outlet.