Spread the sea or smoked salt in a shallow dish. Run a lime wedge around the rim of a rocks glass and dip the rim into the salt to lightly coat. Set the glass aside.

Combine ingredients

Add 2 oz reposado tequila, 0.5 oz mezcal, 0.75 oz fresh lime juice, 0.5 oz agave nectar, 0.25 oz orange liqueur, and 2 dashes orange bitters into a cocktail shaker.

Add ice and shake

Fill the shaker two-thirds full with ice. Secure the lid and shake vigorously for 12–15 seconds, until the shaker is well chilled and slightly frosted.

Strain and serve

Fill the prepared rocks glass with fresh large ice (or one large ice cube). Double-strain the cocktail into the glass (use a Hawthorne strainer and fine mesh if available) to remove small shards of ice and pulp.

Garnish

Express the oils from an orange peel over the drink by holding the peel skin-side down above the glass and gently pinching, then rub the peel around the rim (optional). Add a lime wheel or wedge to the rim or float it on top.

Serve immediately and enjoy. Note: adjust agave to taste if you prefer sweeter or drier.