That's a great question! A loose trash bag spilling its contents is a common urban eyesore. Luckily, there are a few easy, no-fuss ways to secure them.
First, the classic method: after placing the bag, gather the top edges and tie them into a firm double knot. For bins with rim hooks, pull the bag's drawstrings (if it has them) through opposite hooks and tie them together tightly.
If your bin lacks hooks, try the "bungee cord hack." Loop a small bungee cord with hooks around the entire rim of the bin, catching the top of the bag underneath it. The tension holds everything in place beautifully.
For a permanent solution, consider using bin liners specifically sized for public bins, which often have a more fitted design. The key is creating tension or a knot that wind and animals can't easily undo. A few extra seconds securing the bag makes a big difference in keeping our sidewalks clean.