Expand your food storage collection to fit your growing baby's expanding appetite. Each container has measuring markings on the side to help with portioning, and the Containers and lids are clear so you can see exactly what's inside. The easy-to-open lids are airtight to keep food fresh, and leakproof to keep it contained, even when tossed in a diaper bag or purse. Just fill them up and pop them in the fridge or freezer. The Containers can go in the microwave or thaw in your bag. Once the meal or snack is done, the Containers can be put in the dishwasher for easy cleaning.