Our silicone ice mold creates three specially designed hollow cylinder ice cubes. The 1st 2nd 3rd ice cubes are perfectly compatible with 40 Oz tumbler cup. The 1st+2nd ice ring cubes can be used for 20 Oz-30 Oz tumbler cups (Notice: The 3rd ice cube is not compatible with the 20 Oz and 30 Oz tumbler) The 1st 2nd 3rd ice cubes all are 2.8 inch height and 0.47 inch thickness. The outer diameter of 1st 2nd 3rd hollow cylinder ice cubes are 2.4 inch, 2.8 inch and 3.34 inch. The large ice cubes keep your drinks cold longer, ensure a slower melting rate and help maintain the drink's temperature without diluting it too quickly. Package List: 1 Pack Tumbler Ice Mold (The Cup is not Included） Made from Long-lasting and safe silicone material, our ice cube mold is food-grade, odorless, BPA-free, and leak-free.