TWSBI Diamond 50ml Ink Bottle

The TWSBI Diamond 50ml inkwell bottle is made from excellent quality glass with a useful, small internal reservoir meaning that even the last few drops can be used in piston filling fountain pens. It also features an innovative double cap, which means the Diamond 530, 540 and 580 pens can be filled from a value (when their nib units are removed) making filling a quicker and cleaner task.

The cap is Black aluminium with the high quality chrome and red TWSBI logo. The secondary aluminium cap, which houses the valve is available in Black, Red, Blue or Silver. The secondary cap can be removed completely and the black cap will fit directly onto the bottle. Please note that this is an empty ink bottle to be filled with your favourite ink to make it more useable.

TWSBI’s roots can be traced back to 1969, with the establishment of Ta Shin Precision in Taiwan. Having spent 50 years as an OEM manufacturer for numerous global companies, in 2009, they decided to launch their own brand of fountain pen – TWSBI. Ever since, their products have gained immeasurable popularity, thanks to their blend of scientific precision with modern flair. Their various ranges always prove a hit with customers, with the brand regularly seeking feedback from users prior to developing their next release.