Seriously, what's so bad about milk and juice? The sugar content in 100% juice is not a concern for a growing and active child. While I'm not a huge fan of milk, it's not really UNhealthy either. Certainly much less unhealthy than soda or sugared up psuedo-juices.

If you're defining healthy as "has no ill effects", then you're pretty much left with water (Which, btw, you can drink too much of.) So unless all you drink is water, stfu.