Made from 100% flexible, BPA-free food-safe silicone, OXO Tot Silicone Baby Blocks have press-on leakproof lids for safely stacking, storing and transporting homemade baby food. Built-in measurement markings make it easy to portion purees, and the included storage tray keeps your fridge or freezer neat and tidy. Clear construction means no more guessing what's in store—freezer, microwave and dishwasher safe.