Caffiend: 24:7 Coffee Energy

Cold coffee drinks have been a cool commodity since Starbucks introduced its Frappuccino line. Since then, makers of energy drinks like Rock Star and Monster have added cofffee-type drinks to their line of products. The latest energy drink to jump on the iced coffee bandwagon is 24:7 Energy. Let's see how it stacks up.

Looks like: Something pretty bland. The can is a dark caramel color with limited decorations.

Smells like: The aroma of a coffee filter, a couple days after a pot of coffee's been brewed.

Tastes like: Coffee with a hint of earthiness. The flavor is very similar to Starbucks' Frappuccinos, but maybe a little creamier.

Caffeine and other contents: A 15 ounce can packs a whopping 122 mg of caffeine, compared to the 80 mg in an eight ounce can of Red Bull. There's also 6 mg of Guarana (herbal caffeine), 25 mg of Taurine, and 200 percent the recommended daily allowances of vitamins B2 and B6.

Caffeine kick: More subtle than coffee, but still formidable. Half a can will carry most through their mornings and into the lunch hour.