Mechanical Toilet Seat
Ok this is for all the women out there... Imagine a toilet with a mechanical seat that when flushed it automatically retracts the seat to the 'down position'. An adjustable timer feature can also be added to allow users to set the delay of the seat being retracted (so you're not left sitting on the seat).
I think this idea can defentally take off if marketed correctly.
Imagine... No more nagging of the wife about leaving the toilet seat up. Life is beautifull isn't it?
Reward: Recognition and free toilets?