A coffee cup, for people always having one in their hand; Navigates with simple light signals (for left, right and forward).
It also vibrates when telling you to stop, along with flashing red lights. When you reach destination, vibrates in different manner, followed by green lights 🙂
upcoming turning: flashing yellow for 10 sec, then green light turns on
turn : green light on
forward : flashing green
turn 180, go backwards : coffee lid turns 180 degrees
stop : “hysteric” vibration with flashing red lights 🙂
stop, you’ve reached destination : ‘pleasant’ vibration followed with green flashing lights