Vessyl is the Yves Béhar designed smart cup that knows exactly what you're drinking. It connects to your iPhone over bluetooth, identifies drinks, nutritional content, along with how much of what you drink. 

Let's cut to the chase: while I only had an hour with a Vessyl prototype, I tried nearly a dozen beverages in it -- and it successfully identified all of them. Within 10 seconds, the device, which currently resembles more of a Thermos than a finished product, recognized Crush orange soda, Vitamin Water XXX, Tropicana orange juice, Gatorade Cool Blue, plain-old water, and a few other beverages, all by name. Yes, this cup knows the difference between Gatorade Cool Blue and Glacier Freeze.