That's an excellent and very observant question! Yes, absolutely. What you're describing is a specific and increasingly common design strategy in urban waste management. These are often called "anti-litter" or "aperture-controlled" bins. The core idea is simple: by limiting the size of the opening, you physically prevent people from disposing of oversized items like household garbage bags, pizza boxes, or even small appliances.
Cities install them in high-traffic public spaces like parks, transit stations, and downtown corridors precisely to discourage the improper dumping of domestic or commercial waste. The goal isn't to make legitimate use difficult, but to target behavior that is costly to manage and unsightly. A person can easily drop in a coffee cup or a food wrapper, but a full-sized trash bag won't fit. This design forces individuals to seek proper, large-item disposal methods.
The effectiveness is notable. It reduces overflow, cuts down on collection costs, and keeps public areas cleaner. It's part of a broader "nudge theory" approach in city planning, where the environment is subtly designed to encourage correct behavior. So next time you see a bin with a surprisingly small slot, you'll know it's a thoughtful piece of urban design, working quietly to solve a big problem.