Some things haven’t changed much over the past hundred years. For example, in both 1919 and 2019, Heinz emphasized that the company offered several varieties of vinegar.
The 1919 Heinz Vinegars advertisement said that “Malt, Apple, and White” varieties were available, and that they were “one of the 57” Heinz products.
The current Heinz brand tagline is “A Vinegar for Every Need.”
Is it grammatically correct to pluralize “vinegar” or is “vinegars” an archaic term?