Made out of top quality FDA approved materials. Each purchase supports American industry and factory workers. FLEXIBLE AND DURABLE ICE TRAYS: No more battling stubborn ice cube trays, Kitch ice trays release easily with just a twist. STACKABLE: Trays stack easily and neatly in the freezer without sticking to each other. BPA FREE AND DISHWASHER SAFE: These Kitch Ice Trays are 100% BPA Free and safe to wash in the dishwasher.