Wancher Poo vs Titan Pens Great Exposition: Two Fountain Pens at the Extremes of Size

Introduction

Every so often it is worth comparing two products that are not really supposed to compete. This is one of those comparisons: two fountain pens, both eyedropper filled, that sit at opposite ends of the size spectrum. One is the Wancher Poo, a deliberately tiny pen priced at €25. The other is the Titan Pens Great Exposition, a custom 3D-printed pen built to the dimensions of a classic oversized pen design. Looking at them side by side says a lot about what size does for comfort, ink capacity, and everyday usability.

Wancher Poo: A Tiny Eyedropper Pen

The Wancher Poo is meant to be a tiny pen, and it succeeds. It is so short that the cap of a Pilot Metropolitan is roughly the size of the whole pen. The combination of orange material and a black cap gives it a slightly Delta-like look, and there is genuinely attractive design work in that black and orange pairing. It ships with a number 5 stainless steel nib in extra fine or fine, and at €25 it is reasonably priced for an attractive little pen.

It is an eyedropper-filled pen holding about 5.6 milliliters of ink, which is actually less than a typical converter at around 7 milliliters. That undercuts the main reason to build an eyedropper pen in the first place: a large ink reservoir. There is also a practical quirk. The nib collar sticks out quite far into the barrel, so if you fill close to the threads and close the pen, ink can bubble out. No converter fits it, so eyedropper filling is the only option.

As a writer, though, it performs. With a wet ink like Lamy Mango it lays down a rich, smooth flow, helped by that small reservoir, and the fine nib writes beautifully. The catch is ergonomics: unless you post the cap, most hands will cramp trying to hold it, and even posted it remains awkward for larger hands. For people with smaller hands or anyone who genuinely wants a pocketable novelty, it may work well. For everyone else it is hard to use in a normal way.

Titan Pens Great Exposition: A Full-Size Statement Pen

The Titan Pens Great Exposition is the opposite proposition. It was 3D printed by Titan Pens to match the shape and dimensions of a Conway Stewart Great Exhibition, minus the fragile silver overlay, so it can be used without fear of damaging an expensive pen. It is about 8 inches of solid pen, and it is genuinely comfortable to hold precisely because it is so big.

The ink capacity is where it gets absurd in the best way: 15 milliliters, an entire standard ink bottle poured straight into the barrel through an eyedropper. It will write for a very long time before stopping. Like many eyedroppers it can burp ink when running low or when heat from your hand expands the air inside, but that is not how it normally writes and it is easily managed by keeping the reservoir topped up. It is a conversation piece, and using it genuinely puts a smile on your face. It is not commercially available off the shelf; you would need to commission one from the maker, and the price will be very different from a €25 pen.

Nib and Writing Experience

The nib contrast mirrors the size contrast. The Wancher Poo runs a number 5 steel nib, while the Great Exposition carries a number 8 titanium double broad nib. Neither size is inherently better; a good nib is a good nib whether it is a 5, a 6, or an 8. But the visual difference is striking, and the size difference is best captured by one detail: the entire Wancher Poo can disappear inside the Great Exposition’s cap.

On paper, both pens write well. The Poo is surprisingly smooth and wet for its size, and the Great Exposition lays down an extremely wet, broad line with its titanium nib. The difference is not quality, it is how long you can comfortably hold each pen and how much attention each one draws.

Things to Consider Before Buying

The Poo is a solution to a problem some people genuinely have: they want a tiny, attractive, pocketable pen and €25 is a fair price for it. If your hands are on the larger end, be honest with yourself about whether you can write with something this small. The Great Exposition is a solution to a problem nobody has, and that is part of its charm. It is not a practical purchase in the usual sense, it is not something you can simply buy, and it demands a tolerance for occasional ink burps. But it is comfortable, fun, and memorable in a way few pens are.

Which One Should You Choose?

If the question is which one to keep, the oversized pen wins for pure enjoyment, while the tiny pen wins on price, portability, and shelf appeal. The Wancher Poo makes sense for small-handed writers and pocket-pen fans. The Titan Pens Great Exposition makes sense for anyone who wants a giant, joy-inducing writer and is willing to commission it. Different people, different needs.

Conclusion

Size does not matter, except when it does. The Wancher Poo proves that an attractive, well-writing pen can come in a tiny package, even if its ink capacity and ergonomics betray the eyedropper concept. The Titan Pens Great Exposition proves the opposite extreme can be just as lovable. Both are worth a look if they match your hands, your habits, and your sense of fun.