96-count Unbleached Mini Baking Cups are made from premium quality, unbleached, greaseproof paper. As no chlorine is used for bleaching, no chlorine is dumped into our lakes, rivers and streams. No need to grease the pan, so additional fat and calories are spared and time is saved. This paper does not affect the taste of baked foods. The cups are microwave safe and proof up to 428 degrees.