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Tomo
Restoring confidence in daily insulin delivery
Summer 2025 | 7 weeks
Software: Solidworks, Fusion 360, Keyshot
Skillset: User research and testing, CMF, prototyping,
CAD, visualization & animation
Tomo is an insulin carry system
built for diabetics managing two
insulins a day.
For half a billion people, diabetes is a way of life.
Yet it quickly shifts from control to concern while managing these daily routines.
"I can't always lift my clothes in public to
inject, and a stomach jab is most effective.
So I go to the restroom since it's private,
but it's not always clean."
Public injections often
come with quiet anxiety.
Many diabetics are on
a dual insulin regime.
"I carry two pens with separate cases for
basal and bolus insulin. It's a big hassle
carrying so much every day, whether I'm
at work or travelling."
Data from interviews and International Diabetes Federation
Studying the unseen frictions of daily injection.
Often forgetting if/when the last dose was taken.
Often forgetting if/when the last dose was taken.
Stomach jab is the best, but not always possible.
Stomach jab is the best, but not always possible.
Forgetting to hold for 10 sec causes insulin leaks.
Forgetting to hold for 10 sec causes insulin leaks.
How might we support multi-pen carry and maintain hygiene while injecting in public spaces?
Inspired by the calm, sculpted form of Zen gardens.
Ideating on how to carry two pens and the case with ease.
The form was refined through
prototyping and testing.
Case size, dial texture, and internal layout user experience were
each explored in parallel and tested and refined using 3D-prints,
narrowing toward a form that felt right in the hand.
Testing the user experience, in hand.
Iterating towards a unified display design.
The exploration began with the unit drum and digital display kept apart,
preserving a manual failsafe if the display ever failed. Iterations gradually
unified them into one form, while keeping their function independent.
Refining CMF and graphic details users
live with, to invoke trust and clarity.
Iterating on a UI states.
Explorations focused on how each state reads clearly, minimizing cognitive load.
Competing shapes were reduced and numbers placed with care, so a unit count
and countdown timer never blur into one misread digit.
Last dose history
10 sec hold
after injecting
Dose logged
Designed to feel like a
companion in a daily ritual.
Two pens, extra insulin, and needles.
Everything you need, still less to carry.
The scalloped design minimizes the area
of contact with the surface it's placed on.
A simple surface,
easy to clean.
Each step supports the user, so nothing is left to memory.
Press button (or turn dose dial)
“Last dose” displays for 3 secs
Set the dose
“10 sec timer” when dial hits 0
Timer counts down to 0
“Dose logged” after 10 secs (Transfer to phone via NFC)
Shared design, distinct identities.
Color, length, and a tactile cap indicator each set
the two pens apart, so the right insulin is never a guess,
even by feel alone.
Designed to feel more like a lifestyle
accessory, than a medical device.
Packaged with care.
© 2026 YASH GHULE INDUSTRIAL DESIGN.
© 2026 YASH GHULE INDUSTRIAL DESIGN.