I totally get that the allergy aspect, but why would you not allow achild any fruit juice? I am truly curious if there is some thing i am missing.
Fruit juice has a TON of sugar in it. They can have a glass of water and a piece of fruit.
Our pedi has told us since DD (almost 5 now) was about 9 months old that giving them fruit juice is just like giving them soda (sugar wise).
They will occasionally have an apple juice box if we are out at a restaurant and there are no other options and they don't want water.
But we allow:
1 Glass of Skim Milk
Water
An occasional Crystal Light fruit punch or Lemonade.
Yeah ~ mean mom ~ but they just don't need the sugar. They also only are allowed candy on the holidays and at Halloween are allowed to keep 5 pieces of candy and the rest they trade for a Gift Wrapped Surprise.

