If your dad is into construction have him help you build a melamine rack on castors for 41 quart tubs. It'll be big, heavy, sturdy, etc. and he can even use the glue if he wants, though it's really not needed.
He probably wouldnt want to do that hahah I also already have the rack so ill just go with that. we were just worried due to the soft material that it wouldnt be too sturdy