MaterialThis coffee cooling ball is made of stainless steel, and not easy to rust, safe and healthy. No need to worry about changing the flavor of your coffee when you use it to cool your coffee. DesignThis stainless steel ice cube has a hollowed out design around the edges, with a solid stainless steel ball about 40mm in diameter set in the middle. Effortless to UseWhen you need to freeze the puck, simply store it in the freezer of your refrigerator for at least 3 hours and then remove it to brew your drink. This stainless steel ice ball can be cleaned with water or dish washing detergent after use, rinse it off, dry it and store it in the freezer to freeze for next time of use. Enjoy Better TasteThis stainless steel coffee cooling ball quickly cools your favorite beverage while maintaining its flavor without melting. Widely UsedThis stainless steel ice cube is not only limited to coffee, it is also suitable for cooling bourbon, whiskey and other liquors. Specification: Material:stainless steel Size Chart: Ball Diameter: 4cm/1.57inchExpand Size: 12cm/4.72inch Package Includes: 1 CoffeeIce Ball Note: Please allow slightly errors due to manual measurement and different monitors.