Lock & Lock Food Container is perfect for storing and organizing foodstuff Has a distinctive silicone seal and a locking tab system that comes with a watertight and airtight seal Smartly designed to let you stack it both upward and sideways to save on space Made from BPA-free plastic for ensuring high levels of safety, this container is safe for cleaning in the top rack of the dishwasher Safe for use in the freezer, microwave & top-rack of dishwasher