Solutions to Green Bin critter invasion?

Green bin lives outside. No good spot to keep it indoors. I'm trying to find a solution to keep squirrels and raccoons out of it -- a daily occurrence.

The best idea I can come up with is some kind of metal animal-proof locker I can roll the thing in and out of. I haven't found one yet.

Outdoor space is not a concern.

Anyone solve this problem already? My green bin is more squirrel-chewed-hole than it is bin at this point.