12-GRAM CO2 POWERLETS - Compatible with most air rifles and air pistols SNUG FIT, SOLID SEAL - For reliable and consistent performance 5-COUNT BOX - Ideal for the air gun target sport enthusiast ...

For those who use these little cartridges, you know how quickly the price can add up. [steve] takes us through the process of adding a valve to a spent cartridge so it can be refilled.

A tight seal and a small CO2 cartridge turn boring, still water into something a little more exciting. You can screw the top on a water bottle Roam sells itself or on a compatible water bottle ...