What I find interesting about this story is that they talk about her regularly consuming twice the daily recommended amount of caffeine. And while drinking up to 10 liters a day of Coke sounds like tragic health practices, per serving Coke comes no where near the highest quantities of caffeine that exist.
According to the Mayo clinic, 200-300 milligrams of caffeine a day is "moderate" (2-4 cups of coffee - they don't say what size "cup"), and 500-600 is "heavy". Now, 12 ounces of Coke is 35 mg of caffeine. Compare this to Hershey's special dark chocolate (20 mg), Coldstone's Mocha ice cream (52mg), Starbucks Venti coffee (415mg).
Say that 1200mg is twice the daily recommended amount (and the Mayo Clinci does not advocate consuming 500-600 as is) - that's 3 Starbucks ventis. And as someone who used to work at Starbucks, there are way more people doing that than apparently dying of caffeine overdoses.
I'm not looking to defend drinking as much Coke as this woman was doing - but linking the consumption to her death still feels like it's missing a number of pieces. Can you OD on sugar?