Generally, when the cost of a bottle or bag is statistically significant, people care for them. Stores sell more bulk stuff, refill bottles, and offer little in the way of their own packaging. It's all a lot less convenient.
In the US, various bulk stores have tried to introduce the packaging reuse notion, but all have gone out of business because we take convenience over reuse.
This will only change when reuse is equally convenient. If I knew how to accomplish that, I wouldn't be pontificating here, but running my own business doing just that.