I'm all for simple when it comes to mixing up cocktails at home; this one certainly fits into that category. And it's delicious, too.
Everyone really liked them yesterday; I made them up just minutes before my guests arrived and kept them in the freezer until serving time so they were nice and cold.
If you are going to make them on the spot, it's a very nice touch to put your serving glasses into the freezer for a few hours beforehand.
Pour a jigger or so of vodka into each glass and top with the diluted concentrate, stir.