Anyone have Trackr? https://www.thetrackr.com/
These things look really cool. The basically stole the idea from Tile, but did it much better. Little blue-tooth devices you can stick on your keys, bag, pets, etc to find them anywhere within a certain distance. As someone who always manages to misplace my keys at home I am sold.
They have a model for your wallet too, but TBH it looks way to thick to actually use it like that. Maybe in a generation or two they could get it down to the size of a proper credit card and we would be talking.
EDIT: Selling these for pets and offering inscriptions seems like a brilliant market play too.