Transporting foods for lunches and picnics and storing leftovers for reheating is a lot safer when using glass or stainless steel containers. The benefit of glass is that you can use it in the microwave! Check out this set from Pyrex, including two 2-cup rounds, one 3 1/2-cup rectangular, one 4-cup round, and one 6-cup rectangular storage piece, all glass, with plastic covers. Pyrex glass doesn't warp, stain, or absorb odors, and can be used in the oven, microwave, oven, refrigerator, or freezer. Sold at Amazon for under US$27 (free shipping). What a bargain!