My sister in law sent me a box of them for Christmas. I'm not a regular whisky drinker (beer is fluid, carbohydrate and pain killer all in one, and suffices as a recovery drink after chasing those 40-50 year old kids up and down the b'ball court) but not diluting the spirits seems like a good thing.
A few drops of water helps unlock the flavor in bourbon (and whiskey ...)
But not enough to dilute the proof.