High-quality silicone, safety, high Flexible, full transparency, Super easy to de-mold The mold is used to create Round coaster, beverage coaster, bowl mat etc.Mold is reusable. It's not super soft, the bottom of the middle is not easy to bend. Please do not use strong glue, which shorten the life of the coaster, and even lead to the failure to demould and damage the mold.