TWSBI Diamond 50ml Ink Bottle - Red

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Designed to fill your TWSBI Diamond fountain pen, this striking glass ink bottle will look at home on any desk. With a specially designed central metal band that connects directly to the TWSBI Diamond pen, a long tube dips into the ink and provides easy, effortless filling. For other fountain pens, the metal section can be removed and the bottle is supplied with a removable central reservoir, allowing you to fill your fountain pen down to the last drop of ink. Please note that this ink bottle is supplied empty. It will need to be filled with your favourite ink.

Key Features

  • Glass ink bottle with red metal band
  • Supplied empty
  • TWSBI logo on bottle cap
  • Metal band used for filling TWSBI Diamond range is also compatible with standard international converters
  • Additional removable central reservoir to assist with filling other fountain pens
  • 50ml capacity
  • Dimensions: D 68mm x H 68mm (Height with metal band in place)
  • Weight (empty – with metal band): 155g

Delivery Information

All orders placed before 3pm Mon-Fri are despatched the same day (except on a bank holiday), even if your order has personalisation. Orders placed after 3pm, at the weekend or on a bank holiday are despatched next working day.

UK: We use a Royal Mail tracked service. Standard delivery is free (£2 charge for orders under £10) and takes 2 to 5 working days, Premium is £3 and takes 1 to 2 working days. Next working day is £6 and is delivered by 4pm (requires a signature).

International: We deliver worldwide with a standard and express service. Please visit our international website

Returns Information

If you are unhappy with your items, they can be returned to us within 21 days of receipt of purchase to be eligible for an exchange/refund. The item must still be in a re-saleable condition and returned with proof of purchase. Items that have been personalised cannot be returned unless they are faulty. Items purchased for Christmas can be returned by 14th January for a refund, as long as all our other returns criteria are met

Should you receive a damaged or incorrectly dispatched item, please inform us within 7 days of receipt, so we can advise you on the return of the item. Call 0208 731 8610 or email If a faulty or incorrect item is returned, we will refund your postage up to the cost of 1st class recorded Royal Mail. If you are sending items from abroad, please call us for a delivery quote