80 Proof Vodka Drinks - 80 proof. 100 times filtered for unequaled smoothness. Some might consider filtering a vodka 100 times crazy. But when you want to make the world’s smoothest vodka you will go to any lengths to get it right. Diamond 100 Vodka, from the makers of Crater Lake Vodka, is meticulously filtered over 100 times through charcoal and crushed lava rock, and aged slightly in new American oak. One sip of Diamond 100 and you’ll think it would be crazy not to make a vodka this good.