I bought an Aeropress (http://en.wikipedia.org/wiki/AeroPress), and it makes awesome coffee. So why not use it to make awesome Kahlua? Here's the recipe I used:
12 shots espresso from an Aeropress
2 1/2 cups sugar
1/2 cup brown sugar
3 cups 40% abv rum/vodka
2tsp vanilla extract
Combine all ingredients and shake to dissolve sugar. Let settle and rack of sediment after a week or so.