Gardeners Supply sells those wonderful Tubtrugs and they have them in lots of colors. They also have a new multicolored one that tempts me mightily.
http://www.gardeners.com/buy/c...
http://www.gardeners.com/buy/j...
They are nice and flexible so you can fold them enough to grab both handles in one hand (which was what made them nice for carting baby goats). I have several and use them for all kinds of things, from gardening to housecleaning to carting in pellets for our pellet stove from spilled bags.