About This US & EU Patented Design: Crafted from sturdy, durable material, these high-grade ice cube molds feature a unique design patented in the US and the European Union. Essential for Creative DIY: Durable silicone molds for creating ancient alien skull figures (2.25"x2.25") in various materials – ideal for resin models, chocolates, soaps, and ice cubes. User-Friendly and Safe: Easy to use, these reusable molds are BPA-free, non-toxic, food-grade, leak-free, and safe for use in microwaves, ovens, and dishwashers. For Whiskey Enthusiasts: Designed to produce ultra-slow melting alien ice shapes that won't dilute your preferred whiskey, maintaining its flavor and strength. For Whiskey Enthusiasts: Designed to produce ultra-slow melting alien ice shapes that won't dilute your preferred whiskey, maintaining its flavor and strength. Overview Material : Silicone Color : Skull & Alien Bundle 2-Pack Brand : Shaped Shape : Alien and Skull Product Dimensions : 5.5"L x 5.5"W x 2.75"H