That's a great question, and one that cities and property managers grapple with all the time. A loose or missing lid is more than just an eyesore; it leads to litter scatter, attracts pests, and creates nasty odors. The "best" way often depends on your specific problem—wind, animals, or human interaction—but here are the most effective and practical solutions.
For a quick, low-cost fix, nothing beats a heavy-duty bungee cord or elastic cargo net. Hook the cord across the lid and under the can's rim or handles. It allows for easy opening by foot pedals or hands but snaps the lid securely shut afterward. It's excellent for combating wind.
If your cans are in a consistently windy corridor, consider adding weight. You can attach flat, sand-filled weights to the underside of the lid, or even use a weighted lid bar that rests across the top. This makes it harder for gusts to flip it open.
For areas plagued by raccoons, squirrels, or stray cats, you need a locking mechanism. Simple side latches or lockable clips that require a deliberate action to open are very effective. Some advanced bins have integrated locking tabs that engage automatically when the lid closes.
Sometimes the issue is the bin design itself. Opt for cans with a domed or conical lid, which wind flows over rather than under. Spring-assisted hinges are fantastic—they close the lid automatically after use. For high-traffic areas, touchless, sensor-operated bins completely eliminate the lid problem, though they are a bigger investment.
Finally, the human element is key. Clear signage ("Press Lid Closed Until It Clicks") and regular maintenance schedules to prevent overflow are crucial. A can that's too full will inevitably have a propped-open lid.
In short, combine a physical securement method (like a bungee cord) with a well-designed bin and proactive maintenance. It’s about creating a system that is simple for the public to use but resilient against the common forces of urban life.