These cartridges contain CO2 (carbon dioxide). They are certified for a food use.
Brouette de Bières®, BP 95, 59163 Condé sur l'Escaut (France) - SARL company with a 9000 ¤ capital - RNCS Valenciennes 493 819 684
CNIL registration number 1194297 - Selling beer to minors is forbidden
Don't drink if you are pregnant, alcohol can harm your baby