In the first six months your baby doesn’t need any drinks other than breastmilk or formula – these contain enough liquid to stop dehydration, even in hot weather.
Once your baby has reached six months you can give him small amounts of cooled boiled tap-water or bottled water (pure water, not mineral water), if he likes it.
Fruit juice may seem like it would be healthy for your baby but actually it can cause a multitude of problems, from tummy aches to tooth decay. If your baby drinks a lot of juice he may lose interest in the breastmilk or formula that is the crucial source of nutrients (including protein, the ‘building block of growth’).
If you do want to give your baby some juice (say, once he’s turned one), dilute the juice half-and-half with water and really limit the amount you give. Look for pasteurised juice to avoid infections (it will be written on the label), and 100% juice – not a fruit-juice drink, which could be loaded with sugar.
Soft drinks are full of sugar and contain virtually no nutrients, making them unsuitable for infants (and children) as they’re bad for teeth. Mineral waters are high in certain minerals that can stress your baby’s kidneys.
Whole cow’s milk can be introduced when your baby is 12 months old. It contains protein, calcium and other nutrients. Toddlers have high energy needs, so reduced-fat milks are not recommended until your child has turned two. Skim milk, which has no fat at all, is not recommended for children under five.
Soy milk – even with added calcium – doesn't have the nutrients your baby needs, which is why it is not recommended as a replacement for breastmilk or formula.
American Academy of Pediatrics. (2001). The use and misuse of fruit juices in pediatrics. Pediatrics, 107, 1210-1213.
National Health and Medical Research Council (2003). Dietary guidelines for children and adolescents in Australia. Canberra: Australian Government Publishing Service.
Smith, M.M., & Lifshitz, F. (1994). Excess fruit juice consumption as a contributing factor in nonorganic failure to thrive. Pediatrics, 93, 438-443.