CONVENIENT: Portion, store, freeze, heat and serve your homemade baby food with ease in these high quality 4oz glass jars.;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.;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.;SAFE: 100% BPA, lead, phthalate and PVC free. Also freezer safe, dishwasher safe (top rack) and microwave safe.;LIFETIME GUARANTEE: If you don't love these glass storage jars and lids for any reason then simply return them for a full refund.