Jennifer Aniston shares her smarts with students

Jennifer Aniston is sharing her water smarts. She's been a spokesperson for Smartwater, the enriched water product, for a while now -- popping up in ads and even carrying the bottled water around town with her. She recently visited a grade school to speak to students about water nutrition and why it's so important.

So is this water really smart? Well, that's questionable. Essentially, Smartwater is distilled water with added electrolytes. Since it isn't also loaded with sugar, artificial colors, and artificial flavors, it's certainly better for you than other electrolyte-enhanced drinks. And if you've just engaged in some serious, extended exercise, then it's not a bad idea to replace electrolytes. But on a day-to-day basis or with your typical workouts, plain water hydrates you just as well. And, since you can get regular water right from the tap, it's much friendlier for the environment than any bottled water.