- Display in orange, just bright enough.
- Default to no clock until time is set.
- Quality-feel dial for duration. Digital and dynamic so faster spinning adds more time per rotation.
- Quality-feel dial for power.
- Quality-feel dial for function, or possibly buttons for this.
- Dial could be pushed for start or other feature. Push again for pause. Push and hold for reset.
- Door opens downward, horizontally mounted.
- Door has a handle; no door button.
- One single pleasurable beep or sound when finished. Alternatively: continuous sound modulated to convey how long remains. Alternatively: silent switch!
- Never beep unnecessarily nor inexplicably.
- Expire remaining time after a short while.
- Indicate when not empty but not running.
- Less noisy afterward than during.
- Large enough.
Make the bottom as flat possible while still rotating content. Rotate the radiation stuff instead? Probably too complex.