Anti smoking pill: "The same as with anti alcohol pills. You swallow the pill that releases some substance when nicotine is present in the ..."
Watermelon freshness tester: "Almost half of the time it happens that when buying a large watermelon, its either half-dry from inside, or tastes like ..."
Tea bag with sugar inside: "A very easy thing to do which would make things a lot easier. No need to carry a sugar pot around anymore!"
A brain chip for scientific research: "So this chip would be placed inside a human skull and would be used to track electrical signals and so one. These signals ..."
Book that sums up old books and where to find them: "so many old books in the world and nobody knows where to find them. this book would put information where to find them ..."
3D food printer: "I insert some minerals, vitamins, etc. and then the printer mixes up the required elements needed to make for instance ..."
USB Adapter for fast USB phone charging: "So far the USB ports have lower voltage (or something) so charging is slower than from usual wall power socket. But if ..."
Tablet with transparent screen like in Avatar: "Roll-able or foldable tablet like in avatar. Just two borders on left and right where camera will be. Of course with touch ..."
Holographic brain scan as a framed picture: "It would look like 3D and would be personal and unique. Can be framed or as a poster or painting."
Alcohol detection in car with engine lock: "The car will detect alcohol from human as soon as he/she gets in and blocks starting up the car."