The Tough Glass Tubs set of baby food storage containers comes with six (6) 4-ounce tubs with leakproof snap-on lids - a total of 24 ounces of baby food storage. Made from super strong, thermal shock-resistant borosilicate glass, these Tough Glass Tubs by Sage Spoonfuls can safely go directly from freezer to microwave or a pre-heated oven (up to 450° Fahrenheit) 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. The silicone ring inside the lids ensures an airtight seal and can also be easily removed for cleaning. These ultra-durable baby food jars are ideal for at home or on the go. Each jar also has measurement marks to ensure perfect portions. Tough Glass Tubs are perfect for homemade baby food, baby cereal, snacks, yogurt, soup, hummus, and more! The jars are safe in the fridge and freezer as well as the dishwasher, microwave, and oven with the lids removed. Made with materials that are free of BPA, phthalate, lead, cadmium, and PVC.