The reason I chose potatoes for my weekly Focus on... was due to the Poland Holiday and all that Vodka!!!
I have found a pretty informative website for you on the delight that is Vodka:
Fear not, it is written in English. Our favourite was the Bison Grass one (nothing to do with potatoes funnily enough!)~ Żubrówka, we brought some home but it's dangerous stuff so we haven't opened it yet!