Ice Cube Sound Tray Perfect for making and freezing flavored ice cubes. They are also ideal for freezing small amounts of food, such as lemon juice, cooking sticks or fresh herbs. With the Tupperware Sound Cube Ice Tray, you can easily pull out ice cubes whenever you want! Great for entertaining or just to add some fun to everyday. The design is compatible with the 'Freezer-friendly' series of products. Safe instructions for use for the dishwasher. Safe to use in the freezer. Not safe for microwave or oven use.