That's a common and frustrating problem! Squirrels and raccoons are incredibly clever when it comes to scavenging for food. For a public setting, you need something durable and low-maintenance. Here are some effective ideas:
First, focus on the lid. Look for bins with locking or latch mechanisms that require human hands to open. Raccoons have dexterous paws, but a sturdy, spring-loaded or bolt-action latch can stump them. A tight-fitting, hinged lid that closes automatically is also a good deterrent.
The material and weight matter. Heavy-duty metal or thick, commercial-grade plastic bins are best. Avoid lightweight plastic that can be tipped over or chewed through. Some models are even designed to be anchored to the ground, preventing animals from knocking them over.
Consider the design. Smooth, rounded surfaces with no footholds make it hard for animals to climb. An internal bag holder that secures the liner can also help, as animals often pull bags out through the opening.
Finally, placement is key. If possible, position bins away from fences, trees, or structures that animals use as launch pads. Well-lit areas can also discourage nocturnal visitors like raccoons.
For public spaces, I'd recommend contacting suppliers of commercial or municipal waste receptacles. Look specifically for models marketed as "animal-resistant," "wildlife-proof," or "vermin-proof." They might cost more upfront, but they save money and mess in the long run by preventing scattered trash. Good luck