Robert Oster Signature Ink Bottle - Blue Martini pantone_fountain_pens When purchasing a Namiki Yukari

When purchasing a Namiki Yukari Collection fountain pen from Pen Boutique

Introducing the 125th Anniversary Classic Collection by Conklin

Encased in a sleek black precious resin body

Citrus ink by Robert Oster

Robert Oster Signature Ink Bottle - Blue Martini pantone_fountain_pens When purchasing a Namiki YukariRead Blog: Questions On Ink Blue Martini Ink by Robert Oster! Aussie color, Blue Martini is occupied in a 50 ml ink bottle to just reach your expectation of delivering writing on the chosen hue. Signature inks are the finest and most original fountain pen inks. It serves as a perfect companion for most of the fountain pens in the world. The bottles are made up of recycled plastic.