I carried a watermelon

1.5 oz Tromba Blanco
1 oz Aperitivo  (E.g Aperol)
0.5 Lime Juice
5-6 Watermelon cubes
2-3 Cucumber slices (no skin)
Ice
Blender
Tajín rim (optional)

Rim your glass with Tajín.
In your blender, throw all the ingredients and blend until smooth.
Pour into the coupe.