Honestly, the short answer is that most urban trash cans do not really “handle” greasy food waste in a special way. They contain it temporarily and move it along. That sounds simple, but greasy waste from street vendors is one of the messier problems a city has to manage. It is wet, heavy, smells quickly, attracts pests, and can leak through bags or seams. So cities usually rely on a mix of better bin design, frequent collection, and clear rules for vendors rather than one magic solution.
A typical public trash can is designed to reduce the obvious problems. Many have sturdy liners or bags, sealed or hooded lids to keep rain out, and leak-resistant bodies. Some have pedals or swing tops so people do not have to touch the bin. In busy food areas, crews often empty bins more often, because if a bag sits too long, grease and liquids can break it down. Maintenance teams may also use absorbent material for spills, pressure-wash bins, and clean nearby pavement to control odors and slippery surfaces.
The collection chain matters just as much as the bin itself. When a garbage truck compacts mixed waste, grease can coat the inside of the truck and create a smelly liquid called leachate. That liquid has to be collected and treated properly at transfer stations or landfills. If a city has separate food-waste collection, greasy leftovers may go into dedicated organics bins and then to anaerobic digestion or composting. Used cooking oil is a different stream: it should go to a registered grease collector or rendering service, not into a public bin.
Street vendors also have responsibility. In most well-run cities, food vendors are expected to manage their own commercial waste, keep grease containers sealed, use grease traps where needed, and never pour oil into public trash cans, storm drains, or the street. Some cities provide vendor-specific food-waste drop-off points or require private waste contracts. Enforcement matters too, because a single vendor pouring oil into a public bin can ruin the bin, the truck, and the recycling stream.
The biggest challenges are contamination and daily operations. Grease can make recyclable paper and cardboard useless, clog drains, and create slip hazards. It can also cause overflowing bins and complaints from residents. That is why many cities use color-coded bins, clearer signs, scheduled pickups, and public education campaigns. The best approach is not to treat public trash cans as grease disposal units. It is to design them for short-term containment, empty them often, separate organic waste where possible, and make sure vendors have a proper route for their greasy waste. When that system works, the public bin stays a public bin—not a leaking grease trap on the sidewalk.