What's the plural form of seltzer water? Here's the word you're looking for.
Answer
The noun seltzer water can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be seltzer water.
However, in more specific contexts, the plural form can also be seltzer waters e.g. in reference to various types of seltzer waters
or a collection of seltzer waters.
