What Are Cream Charger Refills?

Cream charger refills are small, pressurized metal cylinders filled with nitrous oxide (N₂O) gas. They are used with a whipped cream dispenser to turn regular cream into a fluffy, stable foam in seconds. Each refill (also known as a whipped cream charger) usually contains 8 grams of N₂O, though larger sizes are available for commercial use.

These refills are designed to be replaced after each use — once the gas is released into the dispenser, the cartridge is empty and ready for recycling.
https://whippedcreamgas.co.uk/