How do I convince my friend to drink water

Instead of giving her the good points of drinking water, I plan to tell her the negative sides of not doing it. What is thirst? According to [Rolls and Rolls, 1982, Thirst, Cambridge University Press, Cambridge], thirst is a subjective sensation that is aroused by lack of water, and usually people experiencing it report a dry feeling in the mouth and find that water tastes pleasant. That 'dry feeling in the mouth' is already an indicator of the body that it is dehydrated. They even stated that, "there is no doubt that salivary flow correlates well with the need for water." Deborah Boardly said, "waiting to drink until you're parched is a big mistake because that means your blood level is so low you are now drawing water from your salivary glands which in turn cues thirst." Therefore, we should not wait till we are thirsty before we drink water. One good way to pamper your body from the inside is to drink a glass of water with every meal and then take cups between meals. We can also bring water bottle whenever we go out so that in trips, they will always come in handy.