It clearly states the caffeine content on the placard in front of the drink though, and it's called charged lemonade. While that wouldn't necessarily imply it has caffeine, that's at least enough to tell me it's almost certainly not plain lemonade though and I should read what's in it.

You clearly didn't read the article, or actually look at basically any energy drink can. The label of the charged lemonade does in fact list exactly how much caffeine is in each drink, as well as stating it contains as much caffeine as their dark roast coffee.

And Googling the label on a Monster Energy Drink can, there is a label stating that the total caffeine content is 120mg with a warning recommending against consumption by children or those sensitive to caffeine.

Both Monster and the Charged lemonade have labels that say "contains caffeine" you know if you had a heart problem and your doctor said not to consume large amounts of caffeine maybe you would read that label just like the peanuts.

At least you chose an appropriate username.