The Lock and Lock Round Container is 100% air and liquid proof. The container can be cleaned in the dishwasher, heated in the microwave (with an open lid), and put in the freezer. The impermeability of the container makes it ideal for storing spices, dry ingredients, berries and much more. The distinctive snap-down locking hinges and silicone seal allow your food to stay fresh for longer. The unique stacking design can create up to 40% more space in your fridge or cupboard, giving Lock & Lock containers endless uses around the home, not just for food storage.