In linking a subordinate clause and a main clause, a relative pronoun functions similarly to a subordinating conjunction. Unlike a conjunction, however, a relative pronoun does not simply mark the subordinate (relative) clause, but also plays the role of a noun within that clause.
The main ingredient in most vodkas is some kind of grain, such as wheat, corn or rye. Potatoes are another common base ingredient for vodka, according to About.com.
Eristoff Vodka 70 cl 37.5%. ERISTOFF vodka is a 100% grain vodka. It is triple distilled for absolute purity. It's originally from Georgia, where the secret recipe was created in 1806. It's a new brand in the market and worth to try.