This set of two (2) Zoku Ice Ball Molds helps keep your favorite drinks cold without diluting the flavor. These 2.5-inch diameter (4oz.) ice spheres fit into typical drinking, rocks, and cocktail glasses. Simply fill the mold and let it freeze. When the ice balls are frozen, pull open the mold, and push the silicone bottom to release the ice sphere right into your glass?no rinsing required! These round spheres are the perfect addition to any glass or group gathering.Zoku Ice Ball Molds are bright red color in color and stack neatly for easy compact storage on your shelf or in your freezer door. This set of two (2) is perfect for you and a date or friend, or to create a stash of ice balls for your next party in half the time. Use them to keep soda, juice, cocktails or whiskey colder longer, without diluting the flavor. Kids will enjoy it too! Try adding cucumber, lemon or lime slices, or mint to enhance your drinking water.Hosting a party? Add some fruit slices, berries or juice to the molds to add a splash of color to individual drinks or entire pitchers or punch bowls. Stocking up for the festivities is easy and fun. Keeping drinks cool has never looked cooler! The molds are dishwasher safe for easy cleanup. And like all Zoku products, these molds are BPA and phthalate free.