Patent ID: 8007880

Claim:
An insert adapted for addition to a gas-pressurized liquid in a liquid container, the liquid container also having a headspace adjacent to the gas-pressurized liquid, comprising: a body that is activated by pressure, having a perimeter and at least one first cavity, said body having an opening that allows said at least one first cavity to communicate with said headspace; and a positioning device interconnected to at least a portion of said perimeter of said body and arranged outside said perimeter of said body, said positioning device having at least one second cavity, said positioning device further comprising: an opening arranged in a lower surface of said positioning device, which is in communication with said at least one second cavity, said opening being submerged in the gas-pressurized liquid when said insert is floating on the gas-pressurized liquid, a ventilation opening arranged in an upper surface of said positioning device, which is in communication with said at least one second cavity, that directly communicates with the headspace, said lower surface of said positioning device being coplanar with a lower surface of said body, wherein said at least one second cavity ensures that said insert will sink into the gas-pressurized liquid when said at least one second cavity is filled with the gas-pressurized liquid, and wherein said at least one first cavity is maintained in an upright position for communicating with a headspace in an un-submerged state and for releasing contents when said insert is submerged in the gas-pressurized liquid.