The present invention relates to a method for releasing food from a container in order to prepare food packed in a container and foamed food. [Solution] The present invention relates to a container filling
system for dispensing effervescent food, comprising a single-
chamber pressure-resistant container 1 having a bottom 2, side walls 3, and a
nozzle 4, a food composition including food and water, and a
propellant. The invention also relates to a process in which the food composition and
propellant are mixed to form an effervescent mixture, and the effervescent mixture is placed in the container such that when the mixture is released from the container, its volume expands to form an effervescent food.