"Russian Vodka" joke

A Russian is strolling down the street in Moscow and kicks a
bottle laying in the street. Suddenly out of the bottle comes a
genie.
The Russian is stunned and the Genie says, "Hello Master, I will
grant you one wish, anything that you want."
The Russian begins thinking, "Well I really like drinking vodka." Finally the Russian says, "I wish to drink vodka whenever I want, so make me piss vodka."
The Genie grants him his wish. When the Russian gets home he
gets a glass out of the cupboard and pisses into it. He looks at the glass and it's clear. Looks like vodka. Then he smells the liquid. Smells like vodka. So he takes a tast and it is the best vodka that he has ever tasted.
The Russian yells to his wife, "Natasha, Natasha, come quickly."
She comes running down the hall and the Russian takes another
glass out of the cupboard and pisses into it. He tells her to
drink, that it is vodka. Natasha is reluctant but goes ahead and takes a sip. It is the best vodka that she has ever tasted. The two drink and party all night.
The next night the Russian comes home from work and tells his
wife to get two glasses out of the cupboard. He proceeds to piss in the two glasses. The result is the same, the vodka is
excellent and the couple drink until the sun comes up.
Finally, Friday night comes and the Russian tells his wife to
grab one glass from the cupboard and we will drink vodka. She
gets the glass but asks him "Boris, why do we only need one
glass?"
Boris raises the glass and says, "Because tonight my love, you
drink from the bottle."