@mawr my entire food storage is basically just ovensafe glassware with lids and mason jars now :3
I have a set or two of containers isomorphic to these: https://www.amazon.com/Anchor-Hocking-Classic-Containers-26-Piece/dp/B01MXYMS1R/ref=pd_lpo_vtph_79_bs_t_1?_encoding=UTF8&psc=1&refRID=EV6BXRVDPMZC8RY41AEX
They make great 1 or 2 person sized mini-casseroles and also are amazing for storage / marinating stuff overnight. The lids wear out after a few years but are easily replaceable.
I also own a Costco set of Pyrex mixing/baking bowls. I generally bake things for potlucks in them.
Grocery Outlet has been selling Anchor 9x13-ish baking pans with lids cheap. Not sure about pie tins tho.