First Tricorder Invented.

Phillips has created a device called the Personal Food Analyzer, which does exactly what the name suggests. With it you will be able to tell exactly what you are eating, hopefully leading to a healthier diet through educated discernment. Uses include finding out what is really in your Kung Pao from Egg Shen's, and learning with certainty which kind of cream is in that last powdered donut; because no one wants that lemony one.
Future models may be able to tell you if Chekov has a slug in his ear or if alien bacterium have infected Mr. Spock's brain.

via Futurismic