US Patent 9120604 Drinking container with a drinking vessel and a drinking cap

A drinking container with a drinking vessel, a drinking cap and a threaded ring. The drinking vessel has an inner space, a circular vessel opening, an opening edge surrounding the vessel opening and an external thread next to the vessel opening. The drinking cap has a bottom wall, a ring flange surrounding the bottom wall for abutment on the opening edge of the drinking vessel, a drinking element protruding outwards from the bottom wall and a valve for sealing and opening a passage from the inner space to the outside of the mouthpiece, which is openable for drinking and otherwise closable. A ventilation channel is present in the bottom side of the ring flange or in the top side of the opening edge.