comments:
West-Word-604 posted on r/mechanicalpencils2w
zebra also makes a nice small pen/pencil set similar size to the birdie https://www.amazon.com/Zebra-Mechanical-Pencil-TS-3-Silver/dp/B0018RF0IQ
Demetrius3D posted on r/edc3w
Zebra also makes a TS-3 mechanical pencil. So, you can carry a set.