That’s not exactly a solution to the dives and street food joints that couldn’t operate without some form of disposable containers or cutlery. And more importantly, that’s not a solution to the customers of those dives that can’t afford anything more expensive.
On the other hand, I imagine that a portion of waste reduction can simply be a change in habits and doesn’t necessarily cost anything.
I was once trying to explain this sort of idea to a climate change denying acquaintance. I said, forget the environment or the turtles, even if you don’t believe this is harming our environment, why are we using these devices designed to be immediately thrown away? Why do you need a straw with your water/soda but not with your beer? Where does that habit come from?