HIGH-QUALITY FOOD GRADE SILICONE MATERIAL: Food grade silicone molds are safe and non-toxic, more durable, could be contacted the food directly. SMALL & LIGHTWEIGHT CIRCULAR DESIGN: Small and lightweight About 130g per pack, more durable than those only 80g per pack circular ice molds look more cute than square. The ice mold's inwall has decorative pattern, make ice balls look more cool.2.4 inches EASY TO USE: First, cover with the lid. Second, pour the water into the molds from the top hole. Finally, put it into the refrigerator. MAKES PERFECT ICE BALLS FOR YOUR GLASS: The ice balls perfect for Whiskey, Highball, Cocktail and Hurricane Glasses. Surprise your friends and family with ice balls in their drinks while keeping the drinks cold-not diluted.