Self-chilling food or beverage container

A container for a food or beverage comprising:

• a first vessel for containing the food or beverage, and a heat exchange unit including a second vessel containing a pressurized refrigerant;
• said first vessel including a lid, said lid having a score line therein defining a tear panel and a tab affixed to said lid such that upon lifting said tab, said score line is ruptured and said tear panel is bent into said first vessel;
• said second vessel containing a pressurized refrigerant and said heat exchange unit including a closed valve member for releasing said refrigerant from said second vessel and an actuator for opening said valve member;
• said second vessel being housed within said first vessel and being operatively positioned within said first vessel with respect to said tear panel such that said actuator is contacted by said tear panel when said tear panel is bent into said first vessel and said refrigerant is released from said second vessel.