Picking cranberries

We were about 7 hours on moor picking cranberries. I mean real berries, not the Irish rock band called Cranberries):
Cranberries are red berries and are kin to lingonberries. They grow only in NorthEurope, North of Euraasia and North America. Today and last Saturday my wife got on both days 10 litres and I got last Saturday 8 litres and today about 7.5 litres. I think it is rather much. The berries are small and they must be picked separately. But all in all, it is fun to be on moor.