Since, clearly, more than one strawberry is needed to make strawberry juice, why isn't it "fraises"?
Thanks for your reply, but my question was not about the word "juice." My question concerns the French preposition "de," which refers to the juice "of" or "from" strawberries--plural--not the juice of strawberry--singular; hence my question. In English we do, indeed, say, "apple (or other fruit) juice," but when we use the preposition "of" or "from" in that context, we use the plural form of the fruit.
This one is a hard one, "You drink your strawberry juice" sort of sounds awkward. It is like it is missing an object to be a complete statement, like "You drink your strawberry juice in a cup" or "You drink your strawberry juice every morning". If it was missing the possessive then "You drink strawberry juice" sounds more reasonable. "You are drinking your strawberry juice" just sounds like a complete stand alone phrase that properly translates from the French.