TWSBI Diamond 50 Ink Bottle - Black
The TWSBI Diamond 50 ink bottle, like its Vac 20A counterpart, is designed specifically for TWSBI's Diamond series (530/540/580/Mini), but it also works with every type of fountain pens as a regular ink bottle.
Each of the 50 ml glass bottles features an anodized aluminum top that acts as a reservoir for ink when you turn the bottle upside down (make sure the cap is secure before doing so). With this design, you won't have to worry about getting the last drop of ink out of the bottle when it runs low.
For the Diamond series fountain pens, there is an added benefit to refill the pen without using the nib. Simply unscrew the nib section, attach the barrel to the aluminum top of the ink bottle and turn the piston at the end of the pen to draw the ink up.
The ink bottle is available in 4 colours:
*Ink is not included.