CleanKey comes with a retractable carabiner so you can attach it to anything, not just your keys. You can use it to avoid touching public touchscreens, including ATMs and store checkouts, and its design makes it easy to also open doors, press buttons, and pull levers. It's made to reduce your point-of-contact area by over 99%.
But the neatest feature is that it is built with 62% copper content, which KeySmart says makes it "inherently antimicrobial, killing or slowing down the spread of microorganisms including bacteria, viruses, protozoans, and fungi." If you're not sure about that, you can still clean the tool with steel wool or disinfectant wipes.
If any of this interests you, the CleanKey one-pack and two-pack deals are sold out on ZDNet Academy, but you can still get the three pack for $49.99, down from $74.97. That's a 33% savings.