Tag for Coupy Pencil medium?

I noticed some posts on Pixiv are tagged with the medium クーピーペンシル, or Coupy Pencil.
Do we have a traditional media tag that covers this already?

From what I understand the Coupy Pencils are different from crayons and colored pencils.

We don't have a specific tag for it yet.

gofu's colored works are all done using Coupy Pencil and some posts (post #1568586) are tagged with colored_pencil_(medium) while others (post #1568586) are tagged with crayon_(medium).

If there are no objections I'll go start mass tagging coupy pencil_(medium) posts.

FYI, Coupy Pencil is the brand name of Sakura Color Products/Sakura Cray-Pas. It's a type of colored plastic pencil / plastic-type crayon.

I have reviewed these coupy pencils. To me, those are simply harder crayons that are erasable (and hence used like pencils). In this case, I would rather treat these as crayon_(medium).