The OXO – 2Oz Silicone Baby Blocks, Teal is made from 100% flexible, BPA-free food-safe silicone, OXO silicone baby Blocks are airtight and watertight for safely stacking, storing and transporting homemade baby food. Push-on leak-proof lids automatically seal to keep food fresh and prevent diaper bag disasters. Built-in measurement markings make it easy to portion purees and the included storage tray keeps your fridge or freezer totally tidy. Clear construction means no guessing what’s in store-freezer, microwave and dishwasher safe.