Your child should drink 5 to 7 cups a day (about 1 litre). Milk is included in this amount. Have a look at the website of the Netherlands Nutrition Centre for more information (Dutch only).
Drinking quickly fills up their stomach. If they drink a lot before their meal, they won’t be hungry when it’s time to eat.
There are no set rules on the amounts your child should be eating. After all, every child is different. Some children need more food than others. Children realise very well whether they’re hungry or full. So listen to your child and don’t force them to eat or finish their plate.