i hear ya. and new they arent that cheap. i like to keep an eye on the marketplaces.
im not sure about glass, especially with the heft and breakage, but i did watch a tuber that switched to pans and the tops for domes that fit perfectly:
imo using durable plastics or staying away from single use is a good route to go. reusing like you are is good too.
i know its still plastic but ive been designing my own version of deep cell inserts and pots for starting and growing seedlings. hopefully will be way more durable than the cheap stuff that cracks after a year:

