An Oxygen Canister is an item used to fill up your oxygen supply while wearing a spacesuit on the Moon or Mars. Shift right click to fill up your supply.
Crafting[]
A canister is crafted with six Plastic Chunks, Redstone and an Iron Ingot.
Filling up[]
To fill an Oxygen Cannister, you need to put them in a Oxygen Tank. The tank needs to be placed on a planet with oxygen to begin with.