Reddit reviews Microsoft Surface Pen Loop (Black) 5D9-00001
We found 1 Reddit comments about Microsoft Surface Pen Loop (Black) 5D9-00001. Here are the top ones, ranked by their Reddit score.
I haven't tried it myself, but you might try something like this or even this Microsoft one which looks higher quality.
Besides buying something though, I'd treat it like any other pen. Pocket, backpack, bag/briefcase, or in a notebook/wallet that has space for one.