Energy Drinks Are Surging. So Are Their Caffeine Levels. - The New York Times

Energy drinks up, alcohol down in mixed year for beverages

Whatever Happened To SURGE?

Celsius Vs Bang - Showdown of the Titans: A Detailed Comparison of Two Popular Energy Drinks - Crosslake Coffee

Spike Hardcore Energy Drink – BIOTEST

CELSIUS HEAT Inferno Punch Performance Energy Drink, Zero Sugar, 16oz. Can (Pack of 12) : Grocery & Gourmet Food

Energy Drinks: How Much Caffeine Is Too Much?

Ingredients giving energy drink sales a jolt

Caffeine - The New York Times

Inside the Energy Drinks - Graphic

New White Claw Surge Nutrition Info: Calories, Sugar, and ABV

Energy drinks, scrutinized for effects on kids, tout organic ingredients

Celsius' Explosive Growth: A New Player in the Energy Drink Market - Bloomberg

Caffine energy drinks