The gap above three liters
On this page13
The provision
"Wine may be bottled or packed in containers of 4 liters or larger if the containers are filled and labeled in quantities of even liters (4 liters, 5 liters, 6 liters, etc.)"
So above 4 litres the rule is a pattern, not a list
Any whole number of litres, which is a much more permissive regime than the enumerated values below it.
And 3 to 4 litres is a dead zone
3 litres is the top of the list. 4 litres is the bottom of the even-litre allowance. Nothing in between is authorized as a fill.
Which catches the 1 gallon container
A US gallon is 3.785 litres, which sits inside that gap. So a gallon of wine is not an authorized quantity.
And our shelf has a related problem lower down
Three containers at 946.352 millilitres, which is 32 fluid ounces, and the nearest standard is 1 litre. A quart is not on the list either.
US customary volumes mostly are not
12 and 16 fluid ounces are, because they were added deliberately. 24 and 32 are not.
Which makes the quart bottle a format to think about
It can still be filled to 750 millilitres or to 500, with headspace. It cannot be filled to 946 and labeled as the fill.
Even litres above 4 is a bag-in-box regime in practice
A 4 or 5 litre container is not usually a bottle, and the even-litre rule is written for packs rather than for glass.
Nothing in our catalog reaches it
This group tops out at 946 millilitres, and the 4 litre threshold is more than four times that.
And the gap is not an oversight
The even-litre allowance begins at 4 litres by its own terms, so the space below it is a deliberate boundary rather than a drafting slip. 3 litres is where the enumerated list was chosen to stop.
Which makes the 3 litre value the ceiling for a bottle
Anything above it has to be a whole number of litres, and a whole number of litres starting at 4 is a format rather than a bottle size.
So for this shelf only the enumerated list matters
Twenty-five values, two of which our containers land on, and four containers that land between them.