03 · Assistive design

Three versions of a steadier cup.

Outcome: an assistive cup sleeve refined through family feedback, adding practical support while reducing production cost from ¥187 to ¥67.

3design generations
¥187 → ¥67prototype cost
ESP32connected controller
My focuslisten → test → simplify
Assistive cup prototype
Built prototypeHuman-centered iteration
Why

Make drinking safer and less stressful.

The project began with the needs of a person with early-stage Parkinson’s disease and the family members supporting daily care.

How

Let use reveal the next requirement.

Three prototypes changed the strap, heat safety, sensing, reminders, and app functions in response to practical feedback.

Tools

Mechanical + connected hardware.

  • ESP32 and Wi-Fi
  • MPU6050 accelerometer
  • Servo + infrared sensor
  • MQTT, NTP, buzzer, app
  • 3D printing and Mind+
What I learned

The newest technology is not always the best answer.

A color-changing temperature label was easier for an older user to read than a small digital screen—and cheaper.

Engineering evidence

Each version changed the requirement set—not just the appearance.

Version 1 established the stabilizing concept. Version 2 improved heat-safe materials and temperature feedback. Version 3 added motion logging, medication reminders, and connected data while lowering cost again.

Early cup sleeve prototype
Early iteration: establish fit, grip, and strap actuation.
Later cup sleeve prototype
Later iteration: integrate electronics and daily-care functions.
Materials needed for the final pageOne clean photo of each generation in the same angle; a short quote or paraphrased observation from the family; confirmation of Tony’s exact individual role if others were involved.
Future plan

Make the system modular enough for different users.

The source report proposes modular development and eventual wider use.

01

Modular fit

Separate the washable cup insert, strap sizes, and electronics for easier maintenance.

02

Validate

Test comfort, stabilization, and reliability with more users under supervised conditions.

03

Prepare for scale

Review material safety, durability, manufacturability, and data privacy before broader use.