Qi is a brand of tea liqueur made by St. George Spirits in Alameda, California. Founded by Lance Winters and Brian Backus, Qi makes two products: a black tea liqueur using Numi cedar smoked tea, wildflower honey, fruits and spices in a [ingredient=brandy brandy] base, and Qi White, a blend of white teas, bergamot, clove and ginger. 

Both Qi liqueurs are 80 proof and much less sweet than most other liqueurs. 

Qi Spirits Website

Some popular cocktails containing Qi