1. Food Safe Grade Silicone Material: This extra large ice cube molds are made of high quality silicone material which is 100% food safe grade! It does not release any chemically reactive substances into the water, does not irritate the skin and does not pollute the environment, ensuring durability, safety and health! It can withstand extreme temperatures to ensure long-lasting performance and stability! 2. Reusable, Save Your Time and Money: This 8 lb silicone ice cube is a reusable and affordable ice making mold, you don't need to spend a lot of time and money to buy ice cubes at the store, it provides you with a more cost-effective and efficient solution to help your bathtub cool down faster! You only need to put them in the freezer for 12~24 hours to get perfectly large ice cubes, eliminating the tedious process of making ice by hand! And they'll be worth every penny over time, too! 3. Ice Cubes for Cooler: Filling your cooler with ice cubes will keep food and drinks cold for a long time, This oversized silicone ice block molds can be perfect for coolers, soap molds, beach trips, camping, hunting, grilling, fishing and more! 4. Keep Your Ice Bathtub Cool: 8 lbs of ice cubes will keep your ice bathtub cool for a long time, so you can enjoy it for a long time! Any owner of an ice bathtub and portable cold soak tub will choose this extra large silicone ice cube molds whenever possible! Come and try it ~ you won't regret it!