The measuring jug from Pyrex, probably the most sold measuring cup in the world! The bowl is made of very durable borosilicate glass, and can be used in the oven, microwave, freezer and in refrigerator. Withstands dishwasher, oven up to 300 degrees, microwave and freezer down to -40 degrees. NOTE: Can't withstand going directly from freezer to oven. 10 year warranty.