I make peanut brittle every holiday season and NOTHING works better than Pyrex for measuring, mixing AND cooking. For the process I utilize the 1, 2, 4 and 8-cup measuring cups. Over the 32 years of brittle making, I have tried others (knock-offs, Tupperware, glass, plastic...) and NONE have been as convenient, reliable and easy to use. I will never again use another brand's measuring product, not when Pyrex has all I need.