Processes for packaging pressurized beverages. One process includes mixing liquid, a solute that depresses the freezing point of the liquid, and gas. Next, the liquid-gas mixture is allowed to rest. Then, retail containers are filled with the mixture. During the mixing and filling steps of the process, the liquid-gas mixture is subjected to pressures that are higher than atmospheric pressure. Unfortunately, such pressure cannot be maintained when the container is transferred from the filling station to the sealing station causing dissolved gas to leave the liquid and foam to overflow the container during the transfer. To prevent such an overflow, prior to the transfer, the dissolved gas is put to sleep by reducing the temperature of the liquid to below 0 °C (32 °F) and optionally allowing the liquid-gas mixture to rest. The liquid beverage may include milk, coffee, tea, fruit juice, chocolate or mixtures thereof, and may include a gum. A further process includes mixing the liquid and the solute to create a liquid mixture, filling a container with the liquid mixture, sealing the container with a cap that contains a one-way valve, introducing the gas through the one-way valve to the liquid mixture, agitating and cooling, removing the first cap and sealing the cooled liquid-gas mixture in the container. A system for packaging pressurized liquids is also claimed.Linvention concerne un procédé de conditionnement de boissons sous pression. Un procédé consiste à mélanger un liquide, un soluté qui abaisse le point de congélation du liquide, et un gaz. Par la suite, le mélange liquide-gaz est amené à reposer. Des contenants de vente au détail sont ensuite remplis du mélange. Pendant les étapes de mélange et de remplissage du procédé, le mélange liquide-gaz est soumis à des pressions supérieures à la pression atmosphérique. Cependant, une telle pression ne peut pas être maintenue lors du transfert du contenant du poste de remplissage au poste de fermeture hermétique, amenant
