The Tough Glass Tubs set of baby food storage containers comes with six (6) 4-ounce tubs with leakproof snap-on lids. Made from super strong, temperature shock resistant borosilicate glass, these Tough Glass Tubs by Sage Spoonfuls can safely go directly from freezer to microwave or oven without the need to defrost first. Conveniently portion, serve, store, and warm your baby food all in the same container! Airtight and leak-proof snap lids prevent freezer burn and keep food fresh and liquids contained. Ideal for at home or on-the-go. Measurement marks to ensure perfect portions. Tough Glass Tubs are perfect for homemade baby food, baby cereal, snacks, yogurt, soup, hummus and more! Dishwasher, freezer, microwave and oven safe. BPA, phthalate, lead, and PVC-free.