Working in batches place the pineapple chunks with the water in the blender and blend well.Strain the juice through a sieve. Place the juice and sugar in a medium pot.
Bring to a boil, reduce the heat to medium and cook for 15 minutes.
Add the aguardiente and to serve, place sugar in a shallow dish. Moisten the rim of a cup with a dampened paper towel, then dip into the sugar. Fill the cup with the hervido and serve immediately.