The Pyrex Measuring Cup Set from the Classic Prepware collection consists of 3 measuring cups with different sizes: 0.25 liters, 0.5 liters, and 1 liter. The measuring cups are made of borosilicate glass and are easy to read due to the clear measurement markings. Borosilicate glass is very strong glass, which allows for measuring hot liquids as well. The measuring cups are both dishwasher and microwave safe.