USING A LIME WEDGE, RUN IT ALONG HALF OF THE EDGE OF A TALL GLASS, DIP RIM INTO A 1:1 MIXTURE OF TAJIN AND CHUNKY SEA SALT, FILL WITH ICE.
MUDDLE 3 COINS OF JALAPENO IN A COCKTAIL SHAKER.
ADD ICE AND POUR IN 2 OZ TEQUILA.
SQUEEZE 2 LIME WEDGES AND 1-2 LEMON WEDGES INTO SHAKER.
SHAKE ALL TOGETHER AND STRAIN INTO GLASS WITH TAJIN / SEA SALT RIM.
POUR IN 4 OZ TOPO CHICO, STIR LIGHTLY.