vanilla spice perfect energy®
by yogi tea (3 reviews)
price level: $$$$
I highly doubt this helped me focus more than any other caffeinated tea (or for that matter, coffee), but it was pretty tasty, and that's all I went in hoping for lol. It was nice, sweet, and adequately spiced.
I'm not sure this actually helped me focus (any more than a regular cup of black tea), but it's very well-blended and delicious!