Feb 25, 2020 · The silicone cake molds are made of food-grade silicone material. The super-quality silicone material is with the following features: 100% Food-grade silicone, PBA free, non-corrosive, non-toxic. Silicone resists -40~230℃. Easy to clean and store: Dishwasher, Microwave, Freezer all OK. Durable, Unbreakable for many years.