MoodBox by A. Dixon-Blair from uk
designer's own words:
MoodBox uses its smart ring to detect your mood and anticipate your upcoming mood. Then using its stress ball like good cube it releases, sounds, scents and colours in the attempt to change your mood for the better keeping you positive and alert for your day.
Sketch work on product 
App backing product
Different colours product can produce
Final Product
shortlisted entries (400)