Level3 Denver is appealing quite strong cocktail at 1.6 standard drinks. Layered with 45ml whiskey white rye oyo and 10ml bitters grapefruit fee brothers with 45ml orange juice as well as 190ml ice and best with an entree or small snack. Just place ice into highball glass then pour one and a half shots white rye whiskey and add orange juice and sprinkle grapefruit bitters on top and served in a highball glass cold.