I can't say enough great things about Dabbawalla bags! The new preschool backpacks have new straps that stay on kids' backs even better than before. The lunchbags are nice and big (almost the same size as the little backpacks.) These bags are made from eco neoprene which insulates and is machine washable. Dabbawalla is a small family company based in Seattle, Washington and the bags are made in a fair trade women-run factory in Taiwan. They are bags you can feel great about using!