Under six months, babies need only breastmilk or formula. After this, you can introduce small amounts of boiled and cooled water. Children can have other fluids after 12 months – but fruit juice and soft drinks aren’t recommended.

Babies under six months need only breastmilk or formula. There is no need to give water. Dehydration is extremely rare in breastfed babies, as long as they are allowed free access to the breast, which is what health professionals generally recommend.
Talk to your health nurse if you would rather your baby had a routine for breastfeeds or formula feeds instead of feeding on demand.
At this age, you can give your baby small amounts of cooled boiled tap-water in hot weather and if baby seems thirsty. At 12 months, water no longer needs to be boiled – clean tap-water is fine.
Milk and water are still the best drinks, even after your child has turned one. If you allow free access to water, especially in hot weather or when children are running around a lot, they are much less likely to get dehydrated.
To help your child drink adequate amounts of water:
For children over 12 months, full fat cow’s milk is an excellent source of calcium, protein, riboflavin and vitamin B12.
Calcium-fortified soy milk can be used as an alternative to cow’s milk. And remember, breastfeeding can continue after 12 months, for as long as it suits mother and baby.
Fruit juice can provide valuable nutrients – but it has lots of sugar. Children don’t need extra sugar. It’s better to eat the fruit instead.
If you do want to give your child an occasional treat of fruit juice:
Children who drink too much fruit juice can have a poor appetite, diarrhoea, obesity and tooth decay, among other problems.
Like fruit juice, soft drinks and cordial contain lots of sugar. Unlike fruit juice, they have few vitamins or minerals. And cola and other soft drinks can contain caffeine, which could make your child extremely excited, then exhausted.
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.