The Copic Various ink refill bottles come in 358 colours and are compatible with Copic Ciao, Sketch, and Wide markers.
The colours match the Copic Markers and can be intermixed to create your own unique colours.
One bottle can be used to refill a Copic Ciao Marker - 17 times; Sketch Markers - 12-13 times and Wide Markers - 6 times.
Just pull the nib out of the marker and place a few drops of ink inside to refill easy. Don’t Overfill.