This popsicle molds are made of high quality, food-grade silicone, BPA free, non toxic, odorless, tasteless, Eco-friendly, reusable and durable. High quality silicone lid can keep the ice pop clean, melt slowly and keeps ice pop from absorbing freezer odors. Stackable design can save the space in the freezer. Non-stick surface handling is easy release and clean up. You can wash them by hands after use