Methods and apparatus utilizing a high pressure food package involving filling a cup with a quantity of food product chosen so as to be capable of absorbing sufficient CO2 to produce effervescence easily detectable by a person later removing and consuming the food product, introducing CO2 into the cup, closing the lid, pressurizing the interior space with CO2 and generating sufficient effervescence in the food product, applying an anti-tamper feature to the closed cup, allowing the internal pressure of CO2 to increase and stabilize, transporting and holding the package for retail sale, providing means for a consumer to depressurize the package before removing the lid, and providing means for a consumer to hold the cup in one hand and twist off the lid with another hand, and to use fingers of one hand to remove the carbonated food product from the cup.