Oddly enough though, we do have the two-liter bottle of pop. I'm not quite sure how or why that became the standard for pop instead of two quarts, when we sell all other liquids by US customary units. If it were milk, it's be a half-gallon, but for some reason pop comes in two 'liter' bottles.
Especially since two liters is only slightly more than two quarts, I really can't explain why we have the two-liter bottle for pop, when we use US units for all other liquids. Go to a smaller container of pop, and you're back to ounces. :roll:
Although I guess technically wine is sold by the milliliter, we just refer to them as 'bottles', with no volume reference even though they do come in various sizes. Unless it's that really cheap stuff that comes in gallon bottles, then we're back to 'gallons'. I'm not sure what size boxed wines (I avoid them on principle) come in, but again they're just called 'boxes'.
As Dave mentioned, hard booze usually is referred to as a 'fifth' despite its actual measurement, although you can also get it other US units such as a pint and half-gallon. None of them are full US units anymore, liquor having converted to metric by law in the '70's, but we still cling to the old customary terms despite the actual volume discrepancies. Beer and other malt liquors still go by ounces though.
Actually, we passed a law in 1975 mandating that everything was to switch to metric, but everyone except the booze industry largely ignored it. That's the reason though you will see the metric volume in parenthesis as Goes mentioned, even though nobody pays any attention to them.
If the bottled water comes in liters, then it's usually an imported water. Domestic bottled water tends to stick to ounces.