Note, limit 5 per customer.
Editor's Notes & Price Research
This price matches the price of the most recent Frontpage Deal for it. -Corwin
For those who don't mind using a scoop to mix powder into a beverage of their choice, this is over 2x the price of regular, non-SD prices of caffeine powder:
However, note that 100mg of caffeine is about 1/64th teaspoon, so it is easy to take too much caffeine if you use the powder.
[I disagree with the above. They do make tiny scoops and unless you have Parkinson's or something (in which case, my condolences) they're not that hard to use. The powder is fine enough to easily measure an level scoopful using a mini scoop, which I've tested will give you about 50mg. Just don't try to multitask while you're measuring and you'll be fine.]
Just don't be stupid about it: Eating a tablespoon of pure caffeine would be like swallowing a large handful of pills or drinking a few dozen red bulls.
Just for clarification 400 grams of powder caffeine (in the results of the link posted above) is equivalent to 400,000 milligrams. So be very careful and accurate when mixing powered caffeine into a drink or food and remember the average caffeine pill contains "only" 200 milligrams!
When it comes to caffeine, more is NOT better, it is just becomes more dangerous!