Let's look at Almonds which _could be_ produced where water is not scarce, maybe, but instead is grown in central valley CA based on quickly depleting ground water.

Each almond takes about a gallon of water to grow: https://www.almonds.org/why-almonds/growing-good/water-wise

A "drop" is not well defined, but some math says there's about 75,000 drops in a gallon: https://www.quora.com/How-many-drops-of-water-can-fit-into-o...

Let's be generous and say that the Almond farmers hit all of their future efficiency goals, so each almond only takes .5 gallons, and that the drop/gallon math is off by a factor of 2.

That means eating 1 almond is about ~4,000 google searches.