I wouldn't normally do this but ds (23mths) is ill with a vomiting bug so he can't have his usual drink of milk. He has refused to have a drink of water and I was worried about him becoming dehydrated so I made him a weak cup of tea with a small amount of milk in. He drank it all so I'm quite pleased that he has at least taken some water in even though it obviously isn't ideal! Just the once won't affect his iron will it?