These icons come with a file extension called .Ink. In case you do not know, you can create and choose custom icons for those shortcut files from local storage and a remote computer.

Kao has filed a patent for an inkjet ink that includes a terpene phenol resin and a carbonate ester with a boiling point below 150°C. The ink is used to create printed articles and can be applied ...

I shut down the computer. Upon restart, I got 8 or so messages that (filename).ink could not be opened, and that windows needed to know what program to use to open it.