I'm guessing they couldn't sell them for what it takes to make them????

I've got several old "Jerry" cans and guard them zealously...

I also tried the put the model fuel jug inside another container the other day. I've got one of the Slimline manual pumps mounted on a Blitz jug that is about 2.4 gal or something and it just fit inside a plastic 40lb. kitty litter bucket. It certainly seemed to help with controlling the temperature and swelling of the gas jug.