S.G.
I would worry about affordability over quality on this one. Kids generally only use them for a year, so you don't need it to last forever. Look for one that is insulated, simple,easy to open, not a whole bunch of different compartments, and easy to clean. In fact, get the cheapest possible, and if you little one loses it or messes it up you can just go get another one, and no one feels bad.