Wet the rim of 4 short glasses and dip in a mixture of 2 tablespoons coarse salt and 1 1/2 teaspoons chili powder. Fill a cocktail shaker two-thirds of the way with ice. Add 1 cup tequila, 1 cup pineapple juice, 1/2 cup fresh lime juice and 11/2 tablespoons agave nectar. Shake well, then strain into the glasses.
Photograph my Andrew Mccaul