It was explained to us by the physicaans nurse. She said to imagine a funnell filled with applesauce or baby food. It will just sit here and move slowly , but if you add water to it, the food will go out of itquickly, This allows more to be added. Thefunnell is like your stomach. I also had a sister tell me that if we add fluid while we eat it interupts the enzimes in our mouth that starts proper digestion. Remember the band is just a tool. We have to do it 100% to get the results we want. The little things make a the difference between loosing at all or staying the same. Happy loosing.