Reconditioned Steel CO2 Tank. Pressure tested, brand new valve, and paint job (well, it's primer grey, feel free to paint it whatever color you want).
The 2.5 lb tank is extremely mobile, and holds enough gas to carbonate and serve at least 5 five gallon kegs. It's almost a pocket tank, and damn, it's cute.
It really needs some skull stickers to make it not-so-cute. Well, you can decorate it however you want.

Ships empty! You will need to find a welding supply or beverage supply place to fill it for you.

Regulator not included.  but available HERE.