Large Solar Oven/Stove Evacuated 4" Glass Vacuum Tube Cooker Grill BBQ Prepper Rand Solar Cook Roasts, Soups, Stew, Ribs, Cakes, Breads, Cookies, Boil Water, Etc. Interior Volume is over 1 Gallon! Cook for free with only the power of the Sun! Cooks just like a conventional oven. No special recipes required! Includes Silicone stopper to hold in the heat while allowing excess pressure to vent.