That's an excellent and very considerate question! Disposing of sharp objects like broken glass, used razor blades, or metal scraps in a public bin requires extra care to protect sanitation workers, park visitors, and even animals. The absolute best practice is to contain and label.
First, never toss loose sharps directly into the bin. If possible, place the item in a rigid, puncture-proof container. An empty plastic laundry detergent bottle or a sturdy coffee can works perfectly. Seal it tightly with its original lid or strong tape. If you don't have a container, wrap the item securely in several layers of heavy-duty paper (like cardboard) and tape it thoroughly. The goal is to create a bundle that cannot easily break open or poke through.
Next, clearly label your package. Use a marker to write "SHARP" or "CAUTION: BROKEN GLASS" on it. This simple step is a critical courtesy that alerts anyone handling the bag.
Finally, place the secured and labeled package deep inside the public trash bin, ideally at the bottom if you can do so safely without reaching in. This prevents it from falling out or being immediately contacted.
For medical sharps like needles, public outdoor bins are not appropriate. These require special drop-off at designated collection sites (hospitals, pharmacies, or hazardous waste facilities). Your mindfulness in properly packaging everyday sharps makes our shared spaces safer for everyone. Thank you for thinking of others!