Actually as a "consumer" you shouldn't know the difference, you'll be a better "...

		lm28469 1 day ago \| parent \| context \| favorite \| on: Pyrex catalog from from 1938 with hand-drawn lab g... Actually as a "consumer" you shouldn't know the difference, you'll be a better "consumer" that way. As an informed human being who happens to buy things from time to time you should definitely know the difference though.