Losing picks or not having them handy is a thing. Every one of my basses or guitars has these pick holders. I have tried other brands, models, even foam ones, or placing picks between three strings or behind pickguard but all those options are no bueno. These Dunlop brand ones have been produced since the 80s? maybe longer. They seem to last indefinitely.
Being black means there is always some part on your guitar where they can be stuck, out of the way yet easy to grab or put back your pick, fast, I like behind my headstock. They will hold 3 to 6 ish picks, depending on thickness of picks. Unlike other models, they fit almost any size and style of pick.
The 3M? glue is very strong but doesn't leave damage and it has a thin layer of springy foam, which helps with staying put and placement. While I always carry picks in my wallet, I would really rather never not have this specific pickholder as well. Especially if you have nice or really preferred picks, it will save you money by making sure you never lose one.