Used USGI gas can carriers, real military surplus removed from military vehicles.
Most have 3-4 layers of paint on them from government use over the years and some rust from sitting outside, but they will clean up nicely and are perfectly usable as-is. Much stronger than the imported imitations usually seen for sale.
These work with US Jerry cans or the NATO cans we sell.
You get two options for a strap. A used original (will likely have some fading and/or paint, but will be solid and usable) or a new replacement strap with a cam buckle. The cam buckle strap is not original if you are restoring a military vehicle, but it does provide a much more secure and tight fit to reduce rattling.