That's a great question! I've actually been looking into this myself for a community project. An outdoor trash can with a small opening is a smart solution for a few common problems. It really helps discourage people from dumping oversized bags, household trash, or bulky items that overflow the bin. This design is perfect for parks, sidewalks, campuses, or near bus stops where you want to keep the area tidy and reduce maintenance costs.
The key is to look for bins specifically labeled as "anti-litter" or "animal-resistant." Many feature a sturdy, galvanized steel or stainless steel body with a defined, circular opening just 4 to 6 inches in diameter. Some models have a hinged, locking flap over the slot for extra security. Brands like United Receptacles, Glasdon, and Rubbermaid Commercial offer great options. You might also consider a "top-insertion" bin where the opening is on a slanted top, making it even harder to place large objects. It's a simple design change that makes a huge difference in managing waste properly and keeping public spaces clean.