No, it's called SMUGGLING. We are allowed to import a bit over a liter duty-free. After that, it's like $20 a liter. Duties on 2l of spring water are $0.00 :D
P.S. I also brought a liter of Gorki List Pelinkovac so I WOULD have something to declare like a good little boy that I am.. Therefore, I paid $0.00 in duties for 3l (about 3.5 quarts) of hard liquor ;)