Our Alaska Freezer and Storage Containers, designed exclusively for Tupperware, feature a square/round shape to help save space in your freezer and a more flexible material for easy removal of frozen items from the mold. All of our Alaska containers feature an innovative stain guard to help prevent staining from soups, stews, sauces and more. When not in use, keep your freezer shelves tidy by nesting Alaska freezer storage containers inside each other to save space in your storage drawers. - Save space in your freezer thanks to stacking features on the feet and the inside rim at the top of the seal. - Keep your freezer neatly organized with the containers' modularity! - The cool sculpted snowflake design not only lets you know it's safe to store in the freezer, but also makes it easier to grip when wet from condensation. - The seal seals contents from dry air and prevents spills and odors from seeping in from other foods, so your food stays as fresh as possible. - The curve at the bottom of the container allows cold air to circulate more evenly, so food freezes quickly. - Easily remove your frozen food thanks to the flexible material, rounded corners and glossy interior. - The maximum fill line inside the container ensures your food has enough room to expand during the freezing process. - Color Control coating helps prevent staining caused by ingredients such as tomato sauce, carrots, turmeric, etc.