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Tom's Studio Ori Highlighters in Three Colors

New Pen Day! Setting Up the Tom's Studio Ori Refillable Highlighter (And Cleaning Out the Lumos)

June 10, 2026

Tom’s Studio recently announced their latest product - an “infinitely refillable” version of a product that isn’t supposed to be refillable: the highlighter. Dubbed the “Ori,” this new pen works on the same principle as the Lumos and Wren refillable fineliners. Each Ori highlighter pen features a double-ended design with two replaceable cotton reservoirs and marker-style tips. To fill the pen, you dip the end of the reservoir into the ink and watch as the ink saturates the filling system and the tip. Each bottle of Tom’s Studio highlighter ink also includes a small eyedropper, and Tom’s Studio suggests that you apply a drop or two to the tip of the marker to ensure adequate saturation and ink flow.

It never gets old watching these things fill up.

I’m really happy to see a product like this reach market. Way back in the early 2010s, what prompted me to start exploring better stationery was the waste inherent in disposable pens, and especially plastic highlighters. Working in a research-intensive profession, I would churn through highlighters at a somewhat astonishing pace, though my current burn rate has slowed somewhat due to a focus on finer tipped products like the Zebra Mildliners, which use less ink.

While it might look like a bit of a project at first, setting up the Ori (and the Lumos and Wren) is fairly simple even if you get inky fingers!

Tom’s Studio currently makes six different fluorescent highlighter inks that you can use with the Ori: Yellow, Orange, Blue, Green, Pink, and Purple. These are available individually in 5ml dropper bottles, or as a set of 6. Each individual Ori comes packaged with the two colors that match the pen’s anodization, and if you spring for the set of three pens, you’ll get all six inks plus a set of the bullet and brush tips. As of today, all products are available in our own shop.

The three-pen set comes nicely packaged, with inks and all the tips.

Tom's Studio Ori Six Ink Set

If you only want one pen, you can also buy the set of six inks separately.

Inevitable Question: Can I Use the Ori Inks in My Tom’s Studio Lumos Pens?

Yes and No. Per Tom’s Studio, the Green and Purple Fluorescent inks are dye-based, and can therefore be used in the Lumos pens with the fibre or brush tips (i.e., the marker-style tips). The other four inks are pigment based, and should only be used in the Ori Highlighters because they will clog the Lumos. However, all six inks can also be used with dip pens.

Tom's Studio Ori Fluoro Highlighter Ink Writing Samples

These colors are all super saturated and appear as bright as your standard disposable highlighter. Even on the cheapest paper, I’ve had minimal bleedthrough.

The chisel tip on the Lumos (left) is much finer than the Ori’s tip, though it’s not angled and will need to be held vertically.

The brush tip on the Lumos can also be used as a highlighter. For both the brush tip and the chisel tip, I’ve chosen not to use the brass tip protector because it covers too much of the marker.

Another note: given how brightly colored these fluorescent highlighter inks are, and the fact that most of them use pigment, I do not expect that it will be easy to rinse out the reservoirs and tips and change colors. Fortunately, both replacement tips and reservoirs are fairly inexpensive, and even with the Tom’s Studio Lumos and Wren refillable fineliners, I’m finding it easier to simply use a new reservoir or tip rather than spend the time required to rinse these things clean enough to change colors. These reservoirs can be flushed a few times before they will no longer hold ink, but it requires a LOT of work. As you can see below, with certain brightly colored inks, you will likely never get the reservoir completely clear of ink residue.

Despite a lot of washing, these are about as clean as you will get a used reservoir. The top two are probably fine to change colors. The bottom one should only be used with a similarly-colored ink.

The TGS Curated Shop is an authorized retailer of Tom’s Studio products, including pens and inks. We also sell replacement nibs, marker tips, and reservoirs. In addition to our online store, you can see all of these products in our Nashville shop.

In Pens Tags Tom's Studio Lumos Fineliner, Tom's Studio Ori Highlighter, Tom's Studio, Refillable Fineliners, Refillable Highlighters
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