1. Material: 100% BPA free food grade silicone, no smell and after-taste 2. Dishwasher, oven, microwave and freezer safe 3. Each silicone ice ball mold creates 4 ice balls with 4.5CM 4. Flexible and easy release, perfect for whiskey, cocktails, juice or any drinks 5. Temperatures range: -40°F~450°F/-40°C~230°C