Personally I prefer glass anyways, since I can avoid all the problems plastic may have and the spaghetti wont stain it.
IMHO you can't beat those cheap plastic clear containers with blue lids: They nest really well, you can see into them, they last a long time... They're sold under a number of brands: ZipLock, Glad...
Previously we had started hand-washing the plastic Tupperware/Ziplock containers because of warping in the dishwasher. They also stained and discoloured and no matter how much cleaning hand or machine wouldn't go back to looking clean.
We still hand-wash the plastic lids but the glass goes into the dishwasher. Now we have no more warped lids or containers. The containers are microwave safe. We also don't have breakage issues we haven't broken one in 5+ years.
To each their own I guess. My glass/steel dishes are vastly outlasting any plastic ones I've ever owned and are more enjoyable to use.
As far as discoloration, that seems to largely be an issue caused by using the storage containers in the microwave, 3-4 years ago we stopped doing that to reduce the chemical leaching from plastic into food (which seems to be much higher at higher temps).
Agreed that some people will have no issue with breakage, but in our family that was a serious problem. We probably broke half the containers in 2 years, and as I understand it, broken glass isn't recyclable. So, I guess the plus is that it's a more stable chemical compound in the landfill, but it's still going to the landfill. So it becomes a question of: Glass in landfill or plastic that we can reuse longer.
Super curious as to why that might be the case. Isn't breaking glass the first part of recycling? Perhaps it's a safety issue?
It's very different from when I lived in Belgium. Glass went into glass recycling, plastic in a blue bag (and they checked, a LOT), refuse in the grey bin, and there are battery recycling stations EVERYWHERE.
And the way they encourage you to sort your trash in Belgium is by weighing your trash (container full - container empty = weight of trash), and you pay for that. So cheating and throwing your glass into your refuse container will end up costing you.
The recycling was solicited a few years ago with just 3 bins: green for glass, yellow for paper, plastic, metal and a few other things and brown for generic trash
Glass containers are conceptually great. Many of the actual designs are quite bad. Little glass chips in the drawer are not at all rare.
Maybe someone should try to design a dishwasher safe container that is silicone on the outside and glass on the inside. Silicon compounds can adhere covalently to glass, so this should be possible.
Or maybe stainless steel? Though I guess both of those would have an additional problem: You can't see what's in them. In our family, something going into an opaque container in the fridge is nearly guaranteed to end up getting thrown away, though in particular that's a problem for ingredients (rather than prepared foods): if I can't see the chopped onions or half can of crushed tomatoes, I'm gonna forget to use them.
Always at least have some budget for R&D, no matter how successful you are.