El Escorpión Mezcal is an item in House Party. It is shown in-game as "El Escorpion Mezcal" (i.e.: missing the accented character).
After Lety joins the party, El Escorpión Mezcal can be found in the Satchel she leaves in the Front Entry Way. If you do not take it from the Satchel, Lety will give it to you during Queen in the North.