That's an excellent question for anyone managing waste in a city setting! The "best" system really depends on your specific needs, but for large, rectangular urban trash cans—like those in parks, on sidewalks, or behind businesses—a few key features are non-negotiable.
First and foremost, you need a liner designed specifically for rectangular containers. Using standard round bags leads to bunching, poor fit, and wasted space. Look for heavy-duty, high-density polyethylene (HDPE) bags with reinforced seams and a high gallon capacity (55 gallons and up is common). They resist punctures from sharp debris and the stresses of a high-volume public bin.
The top contenders are often can liner systems with drawstrings or flaps. Drawstrings make for quick, secure tying, which is crucial for odor and pest control. Flap-style liners (where extra material hangs over the can's edges) help keep the bag securely in place and protect the can's interior.
For truly demanding environments, consider certified compostable bags if your municipality has a commercial organics program, or antimicrobial-treated liners that inhibit bacteria growth and reduce smells.
Ultimately, the best system is one that fits your exact bin dimensions snugly, is made from tear-resistant material, and simplifies the removal process for sanitation workers. Measure your cans carefully and order samples from industrial suppliers to test the fit and strength before committing to a large order. A proper liner system saves time, money, and keeps public spaces cleaner.