Bird droppings can cause significant damage to outdoor trash cans, leading to corrosion, staining, and unpleasant odors. To design trash cans that resist such damage, consider the following strategies:

1. Durable Materials: Use corrosion-resistant materials like stainless steel, powder-coated metal, or high-density polyethylene (HDPE). These materials are less likely to degrade from acidic bird droppings.

2. Smooth, Non-Porous Surfaces: Opt for surfaces that are easy to clean and prevent droppings from adhering. A glossy or smooth finish allows for quick rinsing.

3. Sloped or Rounded Lids: Design lids with slopes or curves to discourage birds from perching. This reduces the chance of droppings accumulating on the trash can.

4. Protective Coatings: Apply anti-graffiti or hydrophobic coatings to repel liquids and make cleaning easier.

5. Strategic Placement: Install trash cans away from trees or structures where birds roost. Adding a small overhang or awning can also deter birds.

By implementing these design features, outdoor trash cans can remain functional, clean, and visually appealing despite exposure to bird droppings. Regular maintenance, such as prompt cleaning, further enhances longevity.