Handy Uses & Applications of a Collapsible Tub

Everytime I show someone one of these collapsible tubs their eyes light up, whether in recognition of potential uses I'm not sure but what I would like to do here is create a list, common place, funny or obscure, of the many ways a collapsible tub may be handy.

Feel free to add a use or vote for uses you particularly like.  Lets see what we can come up with!