The canister is a can of steam and a one-time use accessory .
How to Obtain
It is obtainable very commonly in chests of dungeons . It is tradeable and can also be obtained by destroying brains of any kind .
When your steam is low , quickly use the canister and it gives you a certain amount of steam instantly so that you can emergency land , or get a quick reload for using your guns .
How to Use
iOS users can swipe up the gear located at bottom-right of your screen and tap the canister icon . Pc/Mac users can press c to use a canister to restore 10 steam!