Calories question?

well okay, this is kind of a health question too, but a movie related one as well. if you've seen the movie thirteen, do you remember the part in the movie where evie is standing in the kitchen w/ a gl of water in her hand and she's talking to mel and says ''you know if you drink 10 gles of ice water a day you'll burn 300 calories'' well is that true?! or not? thanks to anyone who knows!