In the ss they drink n=both beer and whiskey, brands unidentified - likewise the source - but presumably they must have been part of their supplies - they have a quart bottle at one point and couldn't have brought that up with them to last for months, surely? But it seems odd that Aguirre would pay for alcohol - the rest of their food - beans, potatoes, coffee, flour, canned peaches - seems pretty basic and evidently cheap.