Double-Pen Quiver
Used by 2 peoplequiverglobal.com ↗

“I carry a Moleskine sketchbook with a Quiver to hold my Muji 0.5 black pens.”
Madelin Woods Interview, Developer (Square), artist · via Uses This
“I carry a Moleskine sketchbook with a Quiver to hold my Muji 0.5 black pens.”