Pyrex Optimum's 4.2 Litre Glass Oval Deep Roaster is just the right size for a family roast. Its borosilicate glass can withstand a thermal shock of up to 300°C and is even safe for use in the microwave, dishwasher, and freezer. Plus, with large handles for easy gripping and a hygienic and scratch-resistant material, cooking and cleaning have never been easier.