A metal clip accessory for the Skyline Sport Roller and Fountain pens by Kaweco, found here and here.
Kaweco
Perkeo Fountain Pen — $16.00
7 Color Options
Skyline Sport Fountain Pen Ink Cartridges — $3.25
3 Color Options
HAY
Rainbow Tray — From $15.00
2 Size Options
mariage frères
Mariage Frères Tea Bags — From $28.00
7 Tea Options