Could be a scent that was on the delivery man
As for your previous kitty who you didn't see drink, was he a hunter? Was he fed canned food? Animals are meant to get their fluids from their food, carnivores from blood and herbivores through fluids in plants. With the exception of Jasper (and rarely him), my cats don't drink water. I hope they live as long as your kitty
, 22 years, wow
. They are on a raw/canned diet. Cats have a very low thirst drive, one of the reasons why they should never be fed a kibble diet, they end up being chronically dehydrated.