In your shaker muddle 1 jalapeno slice, 1 pineapple chunk, and 1 slice of lime with 1-1/2 oz of triple sec. (If you don't have a muddler then you can use a spoon.)
Add a cup full of ice to the shaker. Then pour in 2-1/2 oz of Dulce Vida Pineapple Jalapeno Tequila and 1-2 oz of sour mix. Squeeze a slice of orange for the juice into the shaker as well. Then shake to get the mixture frothy.
Take a slice of lime and wet the rim of your glass. Dip the glass rim in the Tajin seasoning.
Pour the cocktail from the shaker into your glass and garnish with a slice of pineapple and jalapeno if desired.