Death By Caffeine

Nobody drinks more soda than Z and my mother-in-law (although I think she drinks caffeine-free Diet Coke, I can't remember). I'd like to know how they do on this Death By Caffeine test. I guess most of my caffeine comes drom Snapple Peach Iced Tea, so according to this chart, I could drink almost 300 bottles before dying. Of course, the site doesn't mention what size bottle/can we're talking about. Guess I'll have to actually try the experiment another day.