Soak the pineapple in a mixture of water, vinegar, and baking soda to clean it properly.
Rinse the dried hibiscus flowers lightly to remove any dust.
Peel the pineapple and keep the peel. Remove the hard core and cut the fruit into cubes.
Blend the pineapple with a little water until smooth.
In a large pot, combine the pineapple peel, and water. Bring to a boil.
Once it starts boiling, turn off the heat and add the hibiscus flowers and the mint leaves.
Let the mixture steep for 2 to 3 hours, or overnight if you prepared it earlier.
When the drink is completely cool, strain it through a fine-mesh sieve.
Use your hands to press out as much liquid as possible from the hibiscus and the fruit.
Add the sugar little by little, the pineapple juice, stirring and tasting until it reaches the sweetness you like.
Refrigerate and serve cold. Enjoy!