That's an excellent and very practical question! Living in a humid climate presents unique challenges for outdoor furniture and fixtures, and trash cans are no exception. The constant moisture can lead to rapid rust, mold growth, unpleasant odors, and general deterioration. Based on functionality and durability, I'd strongly recommend prioritizing a few key features.
First and foremost, the material is critical. Stainless steel (especially grade 304 or 316) is the undisputed champion here. It offers superior rust and corrosion resistance compared to coated or painted metals. While plastic bins won't rust, UV-stabilized, heavy-duty plastic is a good secondary option, but ensure it's thick enough not to become brittle.
A feature often overlooked is proper drainage. Look for a can with small drainage holes at the bottom. This allows condensed moisture and any accidental liquid to escape, preventing a stagnant pool at the bottom that attracts insects and accelerates decay.
A tight-fitting, secure lid is non-negotiable. It keeps rain out, reduces internal humidity, contains odors, and deters pests like rodents and insects. A hinged lid or a sliding top is ideal for high-use areas.
For public urban settings, consider a bin with a dark, matte finish on the exterior. It helps conceal minor scratches and scuffs that are more visible on shiny surfaces. Also, a slightly elevated base or feet improve airflow underneath and prevent constant contact with wet ground.
In summary, the "best" can is a stainless steel model with drainage holes, a secure lid, and a durable finish. It might be a higher initial investment, but it will withstand the muggy weather for years, making it more cost-effective and hygienic in the long run. Proper maintenance, like occasional cleaning, will also extend its life significantly.