Choose your fave soft drink, enter your weight in pounds or kilograms, and find out how many cans you'd have to consume in order to kill yourself.
For my beverage of choice, Diet Coke, it'd take 363 cans—at my normal can-or-2-a-day rate, six months to achieve death.
Come to think of it, I wonder in how short a time I would have to consume that quantity for it to kill me.
I also wonder how that page calculates this. My result for Diet Pepsi is 454 cans; for Coke Classic, it's 481 cans.