Safe silicone which contains , and safe to food, soft and comfortable to for touch. Practical in Use: Practical to be in use, which is perfect for your next party. Excellent Mold: The denture shaped ice tray can make ice cubes with 4 teeth. Great : The denture shaped ice tray is great for pranks, novelties, Christmas or birthday gifts. Easy to : Ice tray can be put into the dishwasher for , but it can not be heated in the microwave.