The possible fate of the (unnecessary) plastic bag, if I said "Yes" just now

I went to get a bottle of drink just now, the hawker was about to put the bottle into a plastic bag.

I immediately said 'no need' and carried the bottle away.

To me it's rather unnecessary because the plastic bag has no use to me (which I can carry the bottle by hand) and eventually, it'll be dumped into the dustbin.

While the bottle can cause the pollution as well, but compared to the plastic bag, at least I've avoided one extra pollution, which is not necessary in the first place.

If everybody can cut down the unnecessary plastic bag usage, I believe the world could be much cleaner.