Portion, store, freeze, heat and serve baby food with ease. 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, and the containers are freezer, microwave and dishwasher.