Most people during the meal drink water, but it can be really bad.
In the process of digestion phase course begins in the mouth and here you have 25% already be prepared before going in the gut.
When food properly munch mouth produce sufficient amounts of saliva which helps food in the stomach to go much easier. Saliva, the role of water, and it contains 98% water and 2% digestive enzymes and helps food easier to digest.
If we drink water while we eat we produce less saliva and thus difficult for indigestion food.
If the thumb munch food mixed with our saliva it quite easier to move to our stomach.