Sofia my daughter started pre school! When I was back East this summer my dearest friend Jenni turned me onto this awesome lunch box, Yumbox. They are totally sealed so you can put yogurt or hummus in and they will not spill into another section. The little sections even have suggested foods in them, (proteins, grains, fruit, etc). Which to be honest is wonderful because sometimes you just need to be told what to put in and where. Other days I get creative and do my own thing. Sofia loves her lunch box and easily opens it her self and closes it (she is 2). They come in a verity of colors and different inserts.