Next, using a kife, cut chunks of lime peel off the lime and place them in your jar. Fill the jar up to the the top with cranberries.
You need to add sugar to cancel out the bitterness of the cranberries. You don't want to make the vodka sweet so add less than a 1/4 cup of sugar to begin with (less if you have a a small jar). Pour the vodka on top of the cranberry/lime/sugar mixture, seal the jar, and give it a good shake.
I let my vodka infuse for two weeks and I added sugar twice (just a few tablespoons each time).
It makes amazing cran-tinis and also tastes great mixed with some club soda.