100% food-grade silicone - BPA-free, odorless, and suitable for direct contact with food. Unlike hard plastic ice cube trays that break easily, these silicone ice cube trays are safe, flexible, durable, and easy to clean, suitable for temperatures from -40C to 230C. This silicone ice cube tray is dishwasher safe (silicone part only), and can be used in the freezer and microwave.Large square ice cube tray with lid - the giant square makes 6 giant 5 cm ice cubes at once. The extra-large ice cubes cool your drink quickly and melt more slowly than regular ice cubes, giving you plenty of time to prepare and enjoy your drink. This ice cube tray with lid is ideal for chilling your Old Fashioned, Scotch, Bourbon, or Blended Whiskey. .Large Square Ice Cube Tray with Lid - The giant square makes 6 giant 5 cm ice cubes at once. The extra-large ice cubes cool your drink quickly and melt more slowly than regular ice cubes, giving you plenty of time to prepare and enjoy your drink. This ice cube tray with lid is ideal for chilling your Old Fashioned, Scotch, Bourbon, or blended whiskey. .Easy-to-use design - The lid prevents spills, freezing, or contamination. These individual silicone ice cube trays make it easy to remove the puck and can also be stacked to save space. Simply press your finger on the bottom of each ice ball mold and take as many as you like. The remaining ice balls that don't come off can be stored in the molds and returned to the freezer until next use.