1.Made of food grade silicone which is durable. Temperature tolerance from 40 to 446 degrees Fahrenheit (40 to 230 degrees Celsius). Compatible with instant pot, oven, zer, microwave and dishwasher. 2.Each cube holds 140ml(about 4oz) liquid, measures 5.19' x1.41' x 1.41'. Slowly melting ice is perfect for cooling your whiskey, large water bottle and also for other liquid soup broth sauce leftovers. 3.Easy to Release Clean: the silicone materials is ultra flexible so that whatever food item you were zing removes easily simply push with your fingers from the bottom.Smooth silicone surface makes it easy to clean,dishwasher . 4.Sturdy and :Our zer containers for food are stable and durable, so no matter how long you store it in the refrigerator, it will not be damaged or cracked due to low temperature.You can reuse it indefinitely.