Enviga is a new drink that first became available in January 2007 from Nestlé. The drink is a green tea, caffeinated and carbonated drink that claims to increase your metabolism and increase your fat-burning capabilities. Nestlé claims that per can consumed you can lose up to 20 - 30 calories. Contrary to most bottled green teas, which are high in sugar (and therefore calories), Enviga is actually calorie-negative. The active ingredients in Enviga are EGCG, a naturally occurring plant extract found in tea plants, and caffeine, with 100 mg per serving (about the same as a cup of coffee).