The plastic dome lids are designed for use with yogurt/soup paper cups. We suggest buying our lids for use with our cups. We are not responsible for any misfit with other brands lids or cups. For the flat lids the suggested heat resistance is about 200 degree Fahrenheit. due to the material.*Not for use for cooking or in freezer. It can only be refrigerated.*30oz is 165MM diameter.Available Sizes: 8oz, 12oz, 16oz, 20oz, 24oz, 28oz, 30oz, 32ozLids come in 300 pieces/case, each quantity is 1 case.*Cups sold separately.*