Food Grade SiliconeAdopted 100% safe food grade silicone to ensure absolute food security. Our silicone ice molds are BPA free and FDA approved, Better yet, each tray is easy to clean off quickly and they're dishwasher safe. .STACKABLE with LIDS - Our rectangular shaped ice cube trays make perfect ice cubes easy the trays come with clear, removable hard plastic lids for easy stacking. The lids also help prevent spills, evaporation, or over-freezing, or contamination. Thats also why our ice cube trays are nontoxic and made with BPA-free silicone .BIG SQUARE ICE CUBES Our jumbo square molds creates 8 giant ice cubes at just under 2 inches each. More than a novelty, big ice melts/dilutes more slowly, making them ideal for your Old Fashioned, Scotch, Bourbon or Blended Whiskey. .Simple NON-STICK Design - Unlike stiff plastic ice cube trays, our flexible ice trays are made of durable silicone. These flexible ice molds can be easily twisted or pushed from the bottom to remove ice cubes for an easy release. .100% MONEY BACK GUARANTEE - Quality guarantee and 5-star customer service. If you are not 100% completely satisfied with your silicone ice molds, simply let us know and you will be offered a FULL refund or replacement. .