TWSBI Empty Ink Bottle

TWSBI empty ink bottle

The new ink bottle by TWSBI features an internal reservoir for easy filling even when the level in the ink bottle is low (compatible with all fountain pens). A unique feature also allows for the barrels of TWSBI Diamond series piston-filling pens (ie without nib unit fitted) to be filled by connecting directly to a filling tube.
This method can also be used for filling standard converters.
Anodized aluminum top, glass bottle with approximately 50ml ink capacity.