The Eagle Energy pen measures in at five inches in length and is approximately a half-inch in diameter. One the inside, we have 3ml of liquid which has 0.08 percent caffeine per milliliter. This liquid passes through a small atomizer driven by a non-rechargeable lithium ion battery where it is converted into a vapor and inhaled.
If you’re looking to use this as a replacement to your nasty coffee drinking habits, you will need about 10-20 puffs to notice the and equivalent effect. Each pen advertises to be good for a solid 500 puffs before the batter goes out.
Eagle Energy is more akin to Red Bull than to coffee. It contains a mixture of caffeine (guarana extract), taurine and ginseng without the sugar and the calories.
If you’re looking for more information and a first hand experience with the product, just out Andrew Tarantola’s take over at Engadget.