Uhmericans, insisting a gallon is 3.7l. Well, in the US, where gallons and pints are smaller than the rest of the world - yes. Elsewhere... No.
Then compounding the nonsense by insisting that 128fl. oz is a gallon, and as such is fine... These people have obviously not done their market research, or they'd know the NZ Weights and Measures Act specifically states all measurement are to be in the metric system.
But no... They right.
(I'm feeling especially grumpy. )