That's a really interesting and practical question! Yes, you absolutely can get a waste bin with a smaller opening, and it's a strategy sometimes used in public spaces and specific environments to manage waste disposal behavior.
The logic behind it is quite straightforward. A smaller opening requires a bit more deliberate effort to use. It discourages people from casually tossing in large, inappropriate items like bags of fast-food trash, drink cups, or other bulk waste. This can help keep the bin from overflowing quickly and can subtly encourage individuals to be more mindful about what and how they are disposing of their litter. It's a form of "nudge" design, guiding people toward the desired behavior—proper disposal—without outright prohibiting anything.
You'll often see bins with smaller slots or openings in areas like parks, transit stations, or near benches. They are designed to accept common street litter like wrappers, cans, and bottles while making it inconvenient to misuse the bin for household trash. For a home or office setting, a bin with a smaller opening might be useful in a bathroom or bedroom to discourage throwing away items that should go in a larger kitchen bin.
However, it's not a perfect solution. If the opening is too small or frustrating to use, it might have the opposite effect and discourage use altogether, leading to litter being left beside or on top of the bin. The key is finding a balance—an opening that is convenient for its intended purpose but inconvenient for improper disposal.
So, in short, while a smaller opening won't solve littering on its own, it can be a helpful tool in a broader strategy for cleaner spaces when combined with clear signage, adequate bin availability, and public education.