It's safer than green gas canisters, but it still doesn't have some of the fail safes that a North American propane canister would have. Just don't keep it in a hot area and it should be okay.

The walls of the can are MUCH thicker than the cans of green gas canisters that we use to use.

Confirmed, those things are much thicker than normal cans.

Only problem, shitty seals... so keep them lubed/oiled!

They're definitely not for long-term storage.

It's fine for a day-long skirmish, especially if you don't want to head back to a respawn point to reload.