I subscribe to Springwise which is an incredible source of entrepreneurial ideas. Here are a few recent ones that you might find interesting and even stimulate your own marketing juices.
How about LED ice cubes that send an alert when the drinker has had too much alcohol?
Dhairya Dand’s Cheers ice cubes monitor how much alcohol a person has consumed, and turn red when they have reached their limit. Equipped with an LED, accelerometer, IR transceivers and a battery, the ice cubes measure not only the drink’s alcohol content, but also how fast and how much the user is drinking. At first the cubes light up green when the user begins drinking; over time they change color to orange and finally red as the user keeps drinking beyond the safety limit. Ultimately, the cubes send a text for help to a designated friend via the user’s smartphone.