I love these Pyrex Refrigerator Dishes. And what’s not to love? They come in cheery, primary colors, have clear lids so you can see your leftovers, they stack, and can be used in the oven! These are from the 502 series, manufactured in 1948 – a year before Dow Chemical gave the world Saran Wrap. Despite being 65 years old, these dishes can still be found in thrift stores and on eBay. This set of Pyrex gets a lot of use around here!