Snapware Pure Pyrex 18-Piece Glass Food Storage Set, 2.6, Clear

This Snapware set is made of Pyrex tempered glass which is safe to use in both the microwave and oven. The lids are airtight to keep food fresher longer yet are easy to put on and take off. Plus you can write on the lids to eliminate the guesswork of whats inside. Then erase the lid and reuse.