This glass inkwell from TWSBI has a black anodized aluminum top with colored accents. It has an ink capacity of approximately 50ml.
You can use the specific upper cap design to cleanly and directly fill your TWSBI Diamond 580, Classic, Mini, or Precision fountain pen, or simply unscrew the upper cap to fill any fountain pen from the inkwell itself.
The top of this Diamond 50 Inkwell is also interchangeable with the top of the TWSBI 70ml ink bottles.
I originally bought this inkwell to use with my Diamond 580ALR as I thought it was a neat system designed for some of TWSBI's pens. It did not disappoint. I'll also be using this to fill up any of my other non-TWSBI pens too as the funnel within the inkwell that is used to encapsulate the ink will be very useful to get every last drop of my ink samples. Pair this great functionality with the all-around cool design of the bottle, and it is an obvious win-win for the money.
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