Product Description:Visions Saucepan is made from a unique thermo shock resistant glass and is one of the most versatile glass cookware in the world. Visions can go straight from the freezer to the oven, microwave or stovetop, then served at the table and then put directly into the dishwasher. Visions glass material is used in many unique ways, it is used to melt gold in the Middle East as it can with with stand extreme temperatures and is non-porous. It's development stems from the US Space Programme where the Space Shuttle Cockpit windows are made from this material. Visions Saucepan comes with a glass cover.