Another random thought - Besides things like coffee, tea, soda pop, etc., there are several different brands of caffeinated mints, numerous brands of caffeinated bottled water, I think some sort of caffeinated gum, and even caffeinated soap - but no caffeinated milk! I wonder why not??
Hmm, I'm sure I had other stuff to go on and on and on about, but seeing as how I've forgotten the rest for the moment, I should probably stop typing. Maybe if you're particularly unlucky, I'll post more later. :P