308.85 cans of Pepsi-Cola + You = Death.
Gulp down 146.70 cans of Red Bull and you're history.
You could drink 345.19 bottles of Nestea Iced Tea before croaking.
Gulp down 2347.26 glasses of Chocolate Milk and you're history.
There's no caffeine in Tonic Water, so that won't kill you. You can go for death by sugar intake, though.