Juices can be widely found in Egypt - kasab(sugar cane); erk soos (licorice); sobiia (white juice); tamr and some fresh fruit juices(almost found at same shop which offer all these kind of juices except erk soos may be which you can find another places).

Karkadae is also famous juice specially at Luxor and it is hibiscus tea which is drunk hot or cold but in Egypt it is preferred to drink it cold.Should mention also that hibiscus tea is known to lower blood pressure so be careful.