First off, Energy drinks are scams, caffeine is dirt cheap and they're selling these for ripoff prices, you could make your own for like 20 cents using salt, water, sugar, and caffeine, with no additives. Tastes better, too.
Second, 200mg is an irresponsibly high caffeine dosage and I'm eagerly waiting for legislation that makes 100mg the max for energy drinks. Either that, or actually treat it like alcohol and make it illegal for underagers to buy. 200mg for a teenager is too much for the entire day, and they oftentimes drink several. And no, you can't just assume they'll know better.
As for Matthews, there are few things I respect less than associating with energy drink companies, as I think they're a plague on society.