Food-grade (FDA standard) Silicone. Select 2 or more quantity to see what happened for shippping fee from Allforhome? * Heat Resistant Temperature -40 to +230 Centigrade (-40 to 446 F) * Finished Size(cm): 5.5*5.5*1.8 * Good quality and easy to use and clean * Dishwasher-, refrigerator-, freezer- and microwave-safe