This kind of reminds me of the caffeine soap at United Nuclear.

I wonder if it works on the same principles:
Quote Originally Posted by UnitedNuclear.com
As it turns out, our good old friend Caffeine reaches the bloodstream faster through skin absorption than ingesting caffeinated beverages such as coffee or energy drinks.
Caffeine Soap works faster than Coffee, Soda, or even premium Energy Drinks. With our amazing Caffeine Soap, pure Caffeine is absorbed directly into your skin - which means it gets into your system faster.