Can a drink actually help you *lose* calories?! It seems it can with Enviga -- a new energy drink from Coca Cola and Nestle.

Launched under the Coke brand, Enviga is a carbonated green tea beverage that claims to burn as many as 100 calories a day just from drinking three 12-ounce cans. The negative calorie effect (thermogenesis) of Enviga happens a green tea extract (epigallocatechin gallate) speeds up metabolism when combined with caffeine.