2.5 quart borosilicate glass (heat resistant) popcorn popper has a red, multi-functional silicone lid. Instructions: measure corn kernels by using measurements inside lid, pour kernels into popper, add butter (optional) to the lid, and set on top of popper. Microwave on high for 3 minutes to 3 minutes 30 seconds. No oil needed for healthier popcorn. Dishwasher safe.