Fred and Friends STEAMSHIP steamer lid is an ideal microwave and stove top lid that seals in goodness as you cook, while letting out just enough steam to prevent boiling over. This steam lid is constructed from heavy duty silicone. It's a product that combines fun and functionality in one. The lid measures 10 inches in diameter. Constructed from 100% food safe, pure virgin silicone. A colorful paper storage sleeve is included.