This is something like the cigarette holder. I discovered the need for using the shortened pencils further. All I did was put the two short pencils into a rubber/plastic tube. This I found in the form of a rubber sleeve provided for gripping the ballpoint pen. I removed it from an unwanted pen and lo, the longer pencil was ready. One pencil tip was fitted with a discarded pen cap that suited it perfectly.
I've used a similar pair of pencils and hung it from the 'sleeve'to a calendar for recording the daily milk supply quantity. Very handy.
Collage on the left is self explanatory.