The Copic Refill Ink 0 Colorless Blender 12mL with extra-long applicator nozzle, allows you to refill your Copic markers with ease. Suitable for all Copic markers, simply find the refill with the same colour code as your marker, remove the felt nib from the marker and inject the ink in through the hole, it couldn't be easier! One 12ml bottle of Copic ink will refill a Classic Copic marker approx. five times, a Ciao marker approx. nine times and a Sketch marker approx. seven times. Not just for refilling, the Copic Refill Ink 0 Colorless Blender 12mL can be used alone to achieve alcohol ink-based effects and can be used on Yupo paper in conjunction with the Pinata alcohol inks.