Once I went on vacation to a tropical island. I went to a grocery store on the island. I didn't bring a bag because I was a doofus who had not previously lived or traveled to a tropical island.

There were no plastic bags. There were no paper bags. There was no option to pay money to get a reusable grocery bag like we see in the US. If you were a doofus like me who didn't bring some kind of bag, you only had two options. One was to miraculously carry your stuff home without bags. The other was to use the cardboard boxes that used to contain produce, if there were any left over.

We carried our groceries back to the hotel in a cardboard box that previously contained fruit.

It was a minor hassle in the moment, but I also realized that's how it should be everywhere. There are probably already enough bags in the world for all the carrying that humans need to do. Of course bags wear out, so we need to keep producing some amount of bags, but not many. Most stores should simply not have any kind of bag whatsoever. If you don't bring something of your own, you should be mostly SoL.