Patent ID: 6325236
Filing Date: 2001-12-04
Classification: B65D

Abstract:
A drinking device comprising:a body having an open end and for containing a liquid, anda 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, 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.