A 4-piece Pyrex measuring cup set typically includes cups in various sizes, which can include 1-cup, 2-cup, 4-cup, and sometimes even larger sizes. This assortment means you can tackle a wide range of recipes without needing to constantly wash the same cup. The smaller cups are perfect for measuring sauces, dressings, or spices, while the larger cups can handle larger batches of soups or stews. Additionally, the cups are microwave-safe, allowing you to heat liquids directly in them—another advantage for those who are pressed for time or lack ample cookware.