CONVENIENT: Portion, store, freeze, heat and serve your homemade baby food with ease in these high quality glass jars. Set contains 4 x 4oz jars and 2 x 8oz jars. NO MESS LIDS: Screw on lids come with a silicone seal to ensure they are airtight, watertight and leakproof to prevent spills and keep food fresh for longer. MARKINGS: Each jar has easy to read measurement markings and each set contains a non-toxic wet erase marker pen allowing you to write the contents of each jar on the lid. SAFE: 100% BPA, phthalate and PVC free. Also freezer safe