If your baby is exclusively breastfed or with formulated milk, it is not necessary to add water in the first months of life. Milk, in fact, already contains all the water necessary to maintain good hydration, even in the hottest periods. Water becomes useful only after weaning, that is, from the moment you start introducing solid or semi-solid foods (usually around 6 months) .How much is needed and how to offer it: Offer small amounts of natural water during or after meals, preferably from a shot glass or a cup instead from the bottle. No need to force: the baby gradually learns to recognize thirst. In summer or in case of fever, the pediatrician may recommend increasing fluid intake or breastfeeding more often.Beware of sugary drinks, herbal teas, juices or chamomiles: they are not necessary and may accustom the baby to flavors that are too sweet. If your baby has vomiting, diarrhea or signs of dehydration (dry mouth, less pee, drowsiness), always contact your pediatrician.