That's a great and very practical question! Many people are tired of dealing with spilled garbage and want a secure solution without the hassle of keeping track of a key. The good news is, yes, there are several excellent animal-proof outdoor trash cans that operate without a traditional key.
The most common keyless systems use simple latches or locking bars that are engaged by foot pedals, hand levers, or the act of closing the lid itself. These mechanisms are designed to be easy for humans to operate but tricky for clever paws and noses. Raccoons, bears, and dogs typically can't generate the specific combination of force and dexterity needed to release these locks.
When shopping, look for bins certified as "bear-resistant" by organizations like the Interagency Grizzly Bear Committee (IGBC). These are rigorously tested and often feature robust, keyless locking lids. Brands like Bearicuda, TuffBins, and some models from Simple Human offer keyless options. Features to prioritize include heavy-duty construction (think thick plastic or metal), a weight-sensitive or locking lid that snaps shut automatically, and a low center of gravity to prevent tipping.
For areas with persistent raccoons or stray dogs, a can with a dual-action system—where you must press a button while lifting the lid—can be very effective. Ultimately, the best "key" is a well-designed mechanical lock that keeps pests out while offering you effortless access. It’s all about outsmarting the animals with clever engineering, not just carrying another key on your ring.