In olden times, when I was growing up, making do and mending was a common approach. Now it’s coming back into style, perforce.
People may even begin using pencils again and perhaps not throwing them out when they become tiny stubs -as mine used to.
Today’s invention is a tube into which such stubs can be inserted and which retains the front one using a small screw.
This device maintains as usable lengths of pencil which would be impractically small. This also allows the front pencil stub to be sharpened in situ repeatedly and eventually extracted and thrown away.