There are a few key differences between Type 1 and Type 2 gas cans. For starters, Type 1 gas cans are made of steel, while Type 2 gas cans are made of high-density polyethylene plastic. This makes them much lighter and easier to carry around. Additionally, the spouts on Type 1 gas cans are vented, while those on Type 2 gas cans are not. This means that you can't accidentally spill gasoline when using a Type 2 can. Finally, the nozzle on a Type 1 can is attached to the can itself, while the nozzle on a Type 2 can is removable. This makes it easy to lose track of the nozzle when you're not using it.