And I don't know the economics for making it not so, but it's quite dangerous when it breaks. Not something I want around food (barring glassware that's not particularly fragile).

Glass literally becomes sand after not too long in the environment. It's energy intensive but so is aluminum processing from bauxite and several levels above it. Both are really good at reusability though, also on that front aluminum does just as good at not breaking down.

Doesn't matter if it takes forever to break down, glass is inert and nontoxic