Be no longer a drinker of water only, but use a little wine for your stomach's sake and your frequent infirmities.
More properly interpreted, the passage means, "Drink no longer water only, but use a little wine ...." It is not logical that Paul is telling Timothy to replace all of his drinking water with a "little" wine. Rather, he is giving Timothy apostolic permission to use a little fermented wine for his stomach’s sake, as was the custom in that time.