Crafted with alkaline water naturally filtered from volcanic rock, Hallasan Soju is an excitingly clean and fresh spirit. Hallasan Original Soju has a slightly higher alcohol content (21%) and half the calories of vodka, making it an excellent option for mixing in your favourite cocktails. It is best served cold. Crafted with alkaline water naturally filtered from volcanic rock, Hallasan Soju is an excitingly clean and fresh spirit. Hallasan Original Soju has a slightly higher alcohol content (21%) and half the calories of vodka, making it an excellent option for mixing in your favourite cocktails. It is best served cold. 2400 LONG LAKE ROAD, SUDBURY, P3E5H5, (705) 522-8000