Spiked Melon Balls:
2 cantaloupe balls
2 tablespoons 190 proof grain alcohol (such as Everclear®), or as needed
large ice cubes (optional)
2 fluid ounces pineapple juice
2 fluid ounces orange juice
1 1/2 fluid ounces raspberry-flavored vodka
1 fluid ounce coconut-flavored rum
1 splash grenadine syrup (optional)
Place cantaloupe balls in a small bowl. Pour in enough grain alcohol to cover them halfway. Let infuse, turning occasionally, 4 hours to overnight.
Fill a cocktail shaker with ice. Add pineapple juice, orange juice, raspberry vodka, and coconut rum. Cover and shake until outside of the shaker is frosted. Strain into a glass. Add spiked cantaloupe balls and grenadine syrup.