Close-up of the TWSBI Eco-T front grip section and nib
1. The Grip
TWSBI's Eco has a regular grip with circular cross-section like most pens. The Eco-T has a shaped grip with 3 distinct flattened regions to guide the user into holding the pen with the nib in the correct orientation. If you're familiar with the Lamy Safari then you'll know exactly how this works. It's particularly aimed at young writers and those not necessarily used to writing with a fountain pen. The writer will naturally hold the flattened regions of the front grip between his or her fingers such that the nib always stays in the right position on the paper for comfortable and efficient writing.
TWSBI Eco (left) and TWSBI Eco-T (right)
TWSBI Eco (top) and Eco-T (bottom). You can see the shaped grip of the Eco-T
Computer rendering from TWSBI showing the standard Eco grip (top) and Eco-T grip (bottom)
2. The Cap and Piston Knob
The TWSBI Eco has a regular hexagonal profile to the cap and piston knob. Those on the Eco-T are still 6-sided, but with 3 long sides and 3 short ones that mimic the shape of the grip section.
Launch photo from TWSBI showing the blue Eco-T cap and piston knob
What's the same?
Well, the TWSBI Eco-T has the same barrel and filling mechanism as the regular Eco. This means it has the same comfortable large size and class-leading ink capacity of over 2.5ml (a standard cartridge contains around 0.8ml of ink).
Comparison of the TWSBI Eco-T with the TWSBI Classic (top) and TWSBI Diamond 580 (AL version, bottom).
Like the TWSBI Eco, the TWSBI Eco-T is one of the best budget fountain pens available. It's a size that suits most hands, has unrivalled ink capacity and is available with a choice of 5 nib widths (from extra-fine to broad plus a 1.1mm cursive italic). The Eco-T moves this on a little by helping young writers and those who are either not used to writing with a fountain pen or are new to fountain pens.
At the time of writing the TWSBI Eco-T is only available with a blue cap and piston knob (and of course TWSBI's trademark transparent barrel). However, TWSBI does bring special edition versions of its pens out frequently, such as the TWSBI Eco-T Yellow-Green (launched March 2018)