Unlike hard ice tray, our ice tray is food-grade silicone, which is very soft and flexible. Non-stick: These flexible ice can be easily twist or pushed from the bottom to remove ice for easy release. Easy to clean: Each tray is easy to clean quickly, and can be cleaned with dishwasher. Multipurpose: Use to cools your hand-made cocktails, iced cold brewed coffee, popsicles for Mojitos. Large melt more slowly. It is the for your old-whisky, cocktails.