Combination of a container (1) for a liquid foodstuff and a quantity of propellant (2) to put the container (1) under pressure in order to make the foodstuff flow out of the container (1) via an opening (11), characterised in that at a temperature of 5° C. the propellant (2) has a vapour pressure greater than 115 kPa and at a temperature of 25° C. has a vapour pressure of less than 1000 kPa.