Why should anybody care about this sort of minor defect? You'd rather they increase their waste just so you can get a "perfect" glass? Grocery stores do that with produce, throwing out tons of fine fruits and vegetables per years that picky customers won't touch. And that's only the stuff that gets sent to the store.
There's holding companies accountable, and then there's whatever you're trying to do. Don't let companies fleece you, but don't be so prudish that something like this enrages you.