Mix the jelly mixture with 400ml water in the pot.
Stir to boil until the sugar and jelly mixture is completely dissolved.
Place the cubes of pineapples and nata de coco into a container (the container or mould that will hold the jelly).
Pour the dissolved jelly mixture into the container.
Let the jelly mixture and the cubes settle down and let it cool off a bit before placing it in the fridge.
Once its cooled (you can see the jelly starts to harden at the surface), place it into the fridge.
Once harden, flip it out to slice to pieces or just eat it like that!