That's a great question! A secure lid is key to keeping pests out and preventing messy spills. The "best" lock often depends on your main enemy: is it clever raccoons, strong winds, or both?
For a simple, affordable, and surprisingly effective solution, a heavy-duty bungee cord with hooks is a top choice. Stretch it over the lid and hook it under the can's rim or handles. It provides strong tension that's tricky for animals to lift, and it's quick to remove for collection day.
If you're dealing with persistent raccoons, a heavy-duty latch or lockable strap is a stronger bet. Look for metal or thick plastic models that bolt or screw onto the side of the can and the lid. These create a physical barrier that's very hard for paws to defeat.
For a quick DIY fix, you can use velcro straps, a carabiner clip through the handles, or even drill a small hole through the lid and rim to insert a reusable zip tie or padlock. The goal is to create a connection that requires opposable thumbs to open.
Ultimately, the best lock is one you'll actually use consistently. Start with a bungee cord; it's versatile and works well for most common problems. If that's not enough, upgrade to a dedicated locking strap for maximum security against determined critters.