Water is the perfect diet drink: refreshing, plentiful, and zero calories. Too bad it puts your taste buds to sleep. But the latest bottles are spiked with everything from vitamins to protein. Some even claim to suppress hunger or boost your burn. We tested tons of flavored waters and had nutrition experts vet their claims. These six emerged as the thirst-quenching, diet-boosting champs.
Skinny Water 0 calories per 16.9-oz bottle, 6 flavors
Best for: Curing the 3 o'clock munchies
WH sipped: Raspberry Pomegranate Fruit
The fruit and green-tea extracts in this antioxidant-infused water suppress appetite and promote thermogenesis, your body's natural calorie-burning process.
Tester says: "Usually I'm ravenous by dinner-time, but after drinking this, my stomach missed its standing 7 o'clock appointment to growl."
O Water 0 calories per 20-oz bottle, 5 flavors
Best for: Rehydrating after a workout
WH sipped: Wild Berries
It may not be that kind of "O," but this water's mild flavor satisfies. Plus, the electrolytes keep you hydrated in the hottest conditions.
Tester says: "Because it has flavor, I drank more and could stay on the treadmill longer."
SoBe LifeWater 0 calories per 20-oz bottle, 3 flavors
Best for: A pick-me-up
WH sipped: Fuji Apple Pear
SoBe uses an FDA-approved natural sweetener made from the stevia plant, so there's no artificial aftertaste. Plus, it contains ginseng, which studies show boosts energy.
Tester says: "Like fruit, only more thirst-quenching. And it did make me feel more alert."
Special K Protein Water 50 calories per 16-oz bottle, 5 flavors
Best for: Satisfying a sweet tooth
WH sipped: Tropical Blend
This drink has more calories than other waters we tested, but the five grams of protein and fiber make it more filling.
Tester says: "The super-sweet flavor helped ward off afternoon candy cravings."
Dasani Essence 0 calories per 18.5-oz bottle, 3 flavors
Best for: All-day drinking
WH sipped: Black Cherry
Infused with fruit juices, this water contains no sweeteners or preservatives.
Tester says: "Nothing icky or fake about it."
Vitaminwater10 25 calories per 20-oz bottle, 4 flavors
Best for: Vitamin junkies
WH sipped: Orange
The vitamins in this slimmed-down version don't have fat-busting power, but fans of the original will get the same healthy benefits with fewer calories.
Tester says: "This version may have way less sugar, but it tastes almost identical to the original."