Hard liquor is very expensive in Sweden.
This means that some chemists turn to laboratory alcohol in order to their expenses at a more reasonable level. Vargtass is one favourite way of making use of the tax-free lab alcohol. Mix equal parts of vodka and lingonberry juice in a shaker with plenty of ice. Even better is to mix without ice and leave the mixture in the refrigerator for a few hours. Thus you avoid an unnecessary dilution, but that requires careful planning.