This has been bugging me... We all know the classic problem about how the consuming ice water burns calories, although if you drink 8 glasses a day it is only 70 calories... I wonder about taking that to the extreme but it is hard to burn much more than that as one can only drink so much water. http://health.howstuffworks.com/wellness/diet-fitness/weight-loss/question447.htm Does the water need to enter the stomach or could one hold ice water without swallowing, then spit it out, to burn the same amount of calories? If you did this with 80 8oz glasses per day could you burn 700 calories? I imagine if anybody would rather sit around spitting out water than exercise, they need to re evaluate... but I want to know if this is possible.