I know this is very modern Pyrex but I felt like posting about it because it brings back a lot of good memories of eating re-heated meals in the apartments when I was in college. It’s called a “Grab-It Bowl” and it feature a white Corning base along with a clear brown Pyrex glass top.
The most interesting thing about this mini-casserole is that instead of two smaller handles on either side it has a single large semi-circle “grabber” handle. Both the cover and the base have the handle, so it’s meant to be grabbed and held together. From experience, this can be a bit awkward depending on the size of your hand! Still, many a leftover lunch was stored in the fridge and cooked up in this bowl.
I believe it is a 15 ounce bowl and the cover is marked P-150-C and the base is P-150-B. Although I used it in the early 90s, I’ve actually seen many varieties of these bowls (for all I know, they still sell it), some with plastic covers and in different covers.