Made from 100% flexible, BPA-free food-safe silicone, OXO Tot Silicone Baby Blocks are airtight and watertight for safely stacking, storing and transporting homemade baby food. Push-on leakproof 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. Available in 2 oz/ 59 ml and 4 oz/ 118 ml.