
If using the preferred clay cantarito cup, soak it in cold water for 10 minutes.
Rim the cantarito cup with Tajín seasoning.
Add the tequila, fruit juices, and salt to a shaker with ice and shake until well chilled.
Strain into the prepared cantarito cup (or a Collins glass) over fresh ice.
Top with the grapefruit soda and stir briefly and gently to combine.
Garnish with a lime wedge.
