You have it flipped. The "good" versions are in all caps, the newer models are lowercase. I have some old, borosilicate pyrex and the name is capitalized. If yo

You have it flipped. The "good" versions are in all caps, the newer models are lowercase. I have some old, borosilicate pyrex and the name is capitalized. If you look up a new pyrex measuring cup, you'll note that the name is lowercase.