Pour a ring of sea salt flakes (like the kind used for margaritas), followed by a ring of Tajin on a small plate. Moisten the rim of the glass with a lemon wedge.

Dip the rim of the glass onto the salt and Tajin mixture and turn it right side up again.

Pour roughly 6oz clamato juice into the glass, then the tequila, and the whole bottle of beer.

Top it off with a little more clamato juice, give it a quick stir, and squeeze in the juice of one lemon wedge.

Serve with or without ice.