Theres a site that allows you to see how much caffiene you would have to ingest to die all you have to do is enter your weight and the caffiene product of your choice heres an example (this is my real data to btw)
Coke - 409.50 cans 5 Hour energy - 102.38 botttles Monster Energy - 88.30 cans Mountain Dew - 261.62 cans
Btw, how does caffeine kill someone in large enough amount
Because caffeine is very potent. If you look at the caffeine content of some of the products that house it, it would probably say something around 60mg or something. This coke can has 34 mg.
A sip of pure caffeine can kill you. Why that is, I don't know yet. I just know that caffeine is potent. Chocolate Milk--2047.50 glasses