For people who just find the taste of water too plain, a number of companies have been offering flavorings to boost the flavor while keeping calories low or none. SweetLeaf has jumped into the fray with no-cal, stevia-sweetened Water Drops. Just squirt a bit into a glass of water and it tastes like, in our case, diet lemon-lime soda without the bubbles. Three other flavors are available.

Size: 2.1 fluid ounces

Price: $3.25 to $3.99

Available: Whole Foods and other markets