Thats not hard to do since red bull only has 80mgs of caffiene in it. LOL a large cup of coffee is 3 times as strong as a red bull. If I remeber right a can of coccaine as 300mgs of caffiene in it. Another good one is spike. I have heard of an energy drink out now that has 600mgs of caffiene it. I personally like redburn. 250mgs caffiene plus the active from amp. It gives a way diffrent buzz than caffiene does alone.