Features: Material: silicone Size: 2.5x3.5x2.5cm(L x top W x low W), 2.3cm(insert) Color:Blue, Coffee, Red, Green(Send Randomly) 100% brand new and high quality. Durable and flexible. Environmental and odor free . Can use for Microwave, oven, freezer, and dishwasher. Good for temperatures from -40 to 446 degrees Fahrenheit. Made by FDA Approved Food Grade Silicone. Applicable to beer, rice wine, coke bottle, etc.