What is the counter noun for vinegar?

There isn't a specific "counter noun" for vinegar in the same way you might have a counter noun for "bread" (loaf) or "milk" (gallon).

Vinegar is typically measured by volume, using units like:

* Gallon

* Quart

* Pint

* Cup

* Ounce

* Tablespoon

* Teaspoon

You might also see vinegar sold in bottles of varying sizes.

Therefore, depending on the context, you could use any of these units or "bottle" as a counter noun for vinegar.