The Vegetable/ Seafood Steamer has a lid with a steam release vent. The removable trivet raises food for steaming vegetables. Gemstone is more efficient in transmitting microwave energy to the food than most glass or ceramic ware. This means even cooking and baking, less stirring and rotating and fewer hot and cold spots. This durable and chip proof pan will never melt or warp and is designed for freezer to oven to table to dishwasher use. This Vegetable/ Seafood Steamer is a versatile addition to any kitchen. Proudly made in the USA by Nordic Ware.