That's an interesting question many homeowners ponder! While the concept of a single universal key that opens every outdoor trash can lock sounds convenient, this specific product doesn't really exist in the consumer market for security reasons. Imagine if one key could open all trash can locks - it would defeat the purpose of security entirely.
What you can find are several practical alternatives. Many manufacturers offer locking systems where you can key-alike multiple locks, meaning several locks can be opened with the same key. These are often called "keyed alike" or "master key" systems specifically designed for multiple container security. You'd typically need to purchase these locks as a set from the same manufacturer.
For those seeking simpler solutions, combination locks eliminate keys altogether, while heavy-duty bungee cords or specialized trash can security straps provide basic animal protection without needing keys. If you're managing multiple commercial bins, consulting with waste management companies about integrated locking systems might be your best approach.
The most viable solution for residential use is purchasing multiple keyed-alike locks from reputable security companies that specialize in outdoor and utility locks. This gives you the convenience you're seeking while maintaining proper security for your trash receptacles.