The Red Bull Hierarchy According to Calliope:

Sugar-Free > Red > Regular > Silver > Blue > Gasoline > Lighting Oneself on Fire > Carb-Free

I love Red Bull, and am highly aware that it is terrible for me. It's also expensive, so I don't drink it very much any more. I used to drink a staggering amount of Red Bull/Diet Coke/Coffee every day, which raised my alertness and efficiency to what I needed it to be, and also gave me terrible palpitations. I also appreciate that Red Bull comes in 8.4oz cans, whereas most default energy drinks and coffees here are 12oz or more which is normally too much for me.

Now I drink a cup of coffee every other day. Cold water, fresh air, having something to eat, going for a quick walk and a cup of coffee all help me perk up, but to be honest I have more trouble staying asleep than staying awake these days.