At the tournament...

My friend R and I were competing in an R2's volleyball tournament this weekend, and coming up to the mid-point of the tournament had lost every single game. While R and I were resting and rehydrating from our Nalgene bottles, another friend A came by.

A: So, how's it going out there?
Me: Oh man, we're getting hammered.
A: Really? What's in here? *lifts up the Nalgene bottle*