It's world champion triathlete Mirinda Carfrae. The copy reads, "My training doesn't stop when my workout ends. After a run, I refuel with lowfat chocolate milk for high-quality protein and what I need to help me stay toned. Because it's not over until I say it is."
It directs you to gotchocolatemilk.com. On the site, it talks about the science behind chocolate milk and why it's so good for you.
I'm a runner. I love chocolate milk - who doesn't? My whole family loves it. Though something (her expression, body ... lifestyle) tells me that Mirinda is doing a bit of a harder workout. Good thing. It probably just means she drinks more!