NoGoo nonstick containers are made of silicon that allows you to get 100% of any sticky substance out without leaving anything on the sides of the jar. Tired of using glass or plastic containers that wastes product and feels unsafe? Then you'll be amazed by NoGoo's patent pending nonstick containers. Not only are NoGoo nonstick containers, but they're also: shatter resistant, food grade silicone, heat resistant up to 450 degrees, freezer safe, microwave safe, dishwasher safe, and reusable. AND the custom squeeze/twist top makes them easy to open, AND they're bounce-able. Yes, they bounce and the top stays on!