Aluminum tanks are superior to steel because they do not rust. All tanks are shipped empty. To have tanks filled you will want to visit your local welding supply shop. Because you are purchasing a new tank you can choose to either have it filled or to exchange it for a filled tank at your local gas supplier. If you have this tank filled the local gas supplier is responsible for affixing the correct neck label that identifies the gas being put in the cylinder. 

Tanks should always be stored in an upright position. 

 

New 20# Aluminum CO2 Tank