Container having co2 compressed gas source and overpressure burst safeguard

A container that can be filled with liquid and closed in pressure-tight condition, and from which liquid can be withdrawn, comprising:

• an insert that can be fixed in sealed manner in an opening of the container and a high-pressure CO2 cartridge, a pressure-regulating valve for discharging CO2 therefrom and a control element that is accessible from the outside and that can be actuated to pierce the high-pressure CO2 cartridge, and which has an overpressure safeguard, which in the event of an undesired pressure rise in the container opens a flow path from the top space thereof through the insert to the atmosphere, wherein
• the overpressure safeguard bursts after exceedance of an internal pressure at which the container visibly bulges, but before development of an internal pressure at which the container splits, and in that the bursting part of the overpressure safeguard is a diaphragm on the wall of a housing with which the insert protrudes into the container.