It's a lot but it is the total consumption so it includes all stuff that was sold not necessarily consumed. Fast food sells massive portion that people regularly throw away half full, auto-refills, expired stuff, hell just think of all the coke+menthol videos.

I find the coffee at 46 gallons stranger. 570ml a day of coffee? What's even more wtf is that in Central Europe during and after the war coffee was very expensive/difficult to get so people were drinking coffee substitutes (chicory root for example) while people in the US drank half liter a day.