While it looks like a lot in a photo, but if my numbers are correct with the beer then it works out to be 9 beers per day.
So if like me on fishing trips your days start really early, then having your first beer at say a reasonable time like 10am and you drink one beer per hour, then by 6 pm you have drank your beer quota for the day.
Then a couple of quiet sprits around the campfire to finish off your day.