Ask Lemmy

Maybe you could use them to store gas

Make a pulse jet engine

I refill and reuse mine, I got an adapter I can use a grill tank to fill them up with and take them camping for my lantern and camp grill

Important! Before you drill, cut, puncture or do anything with them you need to remove the residual gas or they may explode on you!

1. obtain or make a valve tool for propane cylinder valves (check youtube).
2. screw on a torch head and try to light it to burn off as much as you can EVEN WHEN THE TORCH WONT LIGHT THERE IS STILL PROPANE IN THE CYLINDER
3. outside in a well ventilated area remove the torch and press the center valve in to verify that pressure is equalized
4. look for the fill valve off center on the top, using the valve tool remove the valve.
5. fill the cylinder ALL THE WAY with water, this will force out any remaining gas.
6. the cylinder should now be safe to work on

Here you take them back and you get a discount off the next one.

We always used them for target practice. They need to be punctured for disposal anyways, you know when you hit one, and They're about the right size for sighting in on a 100yd range.

Do not under any circumstances cut into these cylinders with power tools.

They might not contain enough propane to be useful to you, but there might very well be enough in there to mess you up.

Brother of a friend wanted to turn an supposedly empty oil barrel into an outdoor heater. The residual fumes were enough to cause an explosion large enough to fracture his skull and put him into a coma for multiple weeks.

Put them next to chickens and take a photo that makes it look like you have enormous chickens.

Feed it to the chicken.

Nothing. It's why they are being phased out. recycle them at any place that sells propane tanks.

Have a nice trip: Igorrr - Himalaya Massive Ritual Recording

I would take them to a recycling center that advertises that they accept fuel / propellents.

I used to shoot them with a 30-06. Unfortunately I never got one to go boom like the movies

Put propane in them

You can get adapters to partially refill them from the 20lb bottles.

Terrorism.

Mini Probot of course...

Find a metal saucer to sit them in, drill some big holes around the bottom edge, then a bigger hole in the top

Even better if you could turn them upside down and do this

Ta-da! Mini chicken feeder

I mean, the clue was in the picture

They're fun to use as shooting targets, just do it at 100+ yards

You could refill them then give them away.

Under no circumstances should you puncture the container. It's still a pressure vessel with flammable gas in it and will explode if you try.

In my country if you get bottled gas supplied on contract, the cylinders usually remain the property of the supplier. They'd' take them back and recycle, or the vendor should take them and pass them back.

Very good question. Where I live they are supposed to be separated as "dangerous waste", because people are not trusted to empty them themselves.

Turn it into a big ass flask, they can't arrest you for drinking good 'ol clean burning propane, I tell ya hwat

Could you refill these with methane / biogas from an anaerobic digester? I assume you'd need a specialized compressor.