Honestly, the difference comes down to how the can is used, where it sits, and how much maintenance the city is willing to handle. Plastic urban trash cans are usually lighter, cheaper upfront, and easier to move and empty. They resist rust and many common cleaning chemicals, and they can be molded into complex shapes with built-in lids, dividers, or locking systems. The downside is that cheap plastic can fade, crack, or become brittle after long sun exposure, and it may not handle vandalism or hot materials as well as metal.
Metal cans, especially powder-coated steel or aluminum, tend to feel sturdier and look more premium in public spaces. They hold up well against impact, are better at containing odors and fire, and often have a longer service life if they are maintained. But metal is heavier, costs more upfront, can rust or chip if the coating is damaged, and may be noisier when emptied. In coastal or rainy climates, that coating quality matters a lot.
So in practice: for parks, bus stops, and low-budget residential streets, plastic can be the practical pick; for busy plazas, transit hubs, and high-visibility areas, metal often makes more sense. The best choice isn't simply plastic vs metal—it's the model that fits your climate, collection truck, cleaning routine, and replacement budget.