This is quite true, excepting a regrettable German rogue operation that cheesed-off a certain priest named Martin Luther.

That is why the Dominican priest gave away the bottle of holy water to the previous poster.

Many Catholic holy sites, like Fatima, have nearby (and off-property) trinket booths that sell God-knows-what completely unsanctioned and unprofited by the Church. Instead of supporting these lice, pilgrims can buy (unblessed) gift items in the church shop. In Mexico, the government owns the Church's buildings, and the priests are often helpless to stop the sale of images of false saints and superstitious junk from the steps of their own churches.

Also, it is quite acceptable to fill a small (emphasizing small) bottle from the holy water urn in the back of a church and taking it home. We are quite OK with that. (Although personally, I would have preferred not to see the young Japanese tourists splash each other from the giant holy water urn in St. Peter's at the Vatican.)

If the OP is visiting Israel for instance, he or she can always fill a small bottle of water right from the Jordan River and take it home. I am sure any home town priest would be happy to bless said water, thus making holy water from the Holy Land.