Here the recipes for the drinks, I don't know how can you just serve him just water.
([coffee, cream, mint, honey], "Special Tonic"),
([banana, yoghurt, oats, honey], "Breakfast Oats"),
([tea, milk], "Milk Tea"),
([coffee, milk], "Café au lait"),
([milk, cream], "Half and half"),
([pineapple, coconut, honey, kerrat], "Virgin Tropical Sunrise"),
([water], "a glass of water")