What could you do with two empty Crosman CO2 cartridges?
My son has a little airsoft gun, and he gave me two (for now) empty 12g CO2 Crosman cartridges
. They are so nice that I want not throw them to the waste. But I have them, and I don't know what thing could I do with them. Some ideas? (refrain from the obvious humor)
Diameter: approx 18mm;
Metal: maybe stainless steel?