A threaded CO2 cartridge is a small canister filled with carbon dioxide (CO2) gas under pressure. The canister features a threaded design that allows it to be screwed into a carbonation device, such as a soda siphon or whipped cream dispenser. The threaded CO2 cartridge is used to release CO2 into a liquid, carbonating it and giving it the signature fizz that many customers expect in their favorite beverages.
https://www.rotasswhip.com/16g....-threaded-co2-cartri

The carbonator contains 60 liters’ worth of CO2, which translates to multiple servings of sparkling water. Designed for compatibility with popular sparkling water makers, it delivers consistent carbonation without the need for frequent refills.
https://www.rotasswhip.com/60l-co2-carbonator