Anchor Hocking designed the TrueSeal, glass food storage products to prevent spills and leaks by utilizing the BPA-free textured lid, which seamlessly forms to the glass container. The airtight seal ensures that transporting and keeping food fresh has never been safer or easier. Does not stain or absorb odors. Tempered-Tough Glass is built to last. It is microwave, pre-heated oven, freezer, and dishwasher safe. Ideal meal prep containers: Prep, Bake, Store, and Reheat all in one container. Pack Contains: 2 – 6 Cup Rectangle Food Storage w/2 Lids.