That's a great question! Having seen both types in use across cities, I can share some real-world benefits of galvanized steel bins that might not be immediately obvious.
First, durability is the biggest win. Galvanized steel bins can easily last 10-15 years, even in harsh weather and with constant use. The zinc coating prevents rust, so they don't corrode like ordinary metal. Plastic bins, especially in sunny areas, become brittle and crack after a few years. I've seen plastic lids shatter in winter and sides fade and warp in summer heat.
Security is another major point. Steel bins are much harder to vandalize or set on fire. Their weight makes them difficult to tip over or steal, which is a surprising issue with lighter plastic models. For public spaces, this deterrence is valuable.
They're also more stable in wind, don't fade in color, and generally maintain a cleaner, more professional appearance over time. While the upfront cost is higher, the long-term value and reduced replacement frequency make steel a smarter investment for municipalities and property managers.
From an environmental standpoint, steel is fully and endlessly recyclable at the end of its very long life, whereas plastic waste bins often end up in landfills.
So, while plastic has its place for lightweight, temporary needs, for permanent, high-traffic urban installations, galvanized steel offers superior longevity, security, and total cost of ownership.