From Beaba, this container set features: The perfect storage solution for all of baby’s meals 100% airtight, perfect for transporting meals Store anything from purees to finger foods to dry snacks Use the stack and lock feature for organizing daily meals, or grouping together meals These portions are 100% airtight thanks to the screw thread lid, which means they'll even hold liquids like breast milk, and you can slide them into the nursery bag with no risk of leakage.  Easy to fill wide opening Interlocking lids clip onto the portion underneath (practical in the fridge & freezer) Stackable: easy to store Graduated portion markings (ml and oz) Space (on lid and portion) for writing down contents and date (use dry erase marker) Reheat & defrost (lid off) in microwave oven, Babycook® or in Babymilk Freezer and dishwasher safe Do not use in oven Pack of 6 (6 x 8.5oz) BPA, BPF, BPS, PVC, Phthalate Free Imported.