Where did the water come from?

"Hi Liv!" I greet Olivia in the hallway. Olivia is my good friend. "Hi, Catherine!" She responses. She is taking books out of her locker, and she is holding her water bottle and binder in her hands. Her hands are full with stuff, but she still wants to take stuff out using her hands. Suddenly, her water bottle drops from her hands. "Oops!" She is surprised when she sees there is a small "waterfall" from the bottom of the water bottle. "Where is the water from?" She turns her head to me and asks.
"I think, your bottle is broken."