Egyptian beer was brewed from this fruit and Egyptian pubs showed the chequerboard sign of Osiris outside to promote their wares. Rome imported the practice and the signs across their empire even reaching unruly Brittania. Hence the number of pubs called "Chequers" in the south of Enlgland where the tree and its fruit were popular even until relatively recent times.
In the brewing demonstration, it took on four days to produce a ferment that was 5% ABV. The brew shown looked like still lemonade.
Anyway, an interesting piece of history.
