Start by peeling the mangoes, removing the pit, and cutting the flesh into chunks.
In a blender or food processor, add the mango chunks, sugar, coconut water (or water), chili powder, lime juice, and a pinch of salt.
Blend the mixture until smooth and well combined.
Taste the mixture and adjust the sweetness or spice level if needed by adding more sugar or chili powder.
Pour the mango mixture evenly into the popsicle molds, leaving a little space at the top for expansion.
Insert the popsicle sticks into the molds.
Place the molds in the freezer and freeze for at least 2 hours or until fully set.
To release the popsicles, run warm water over the outside of the molds for a few seconds, then pull gently on the sticks to remove the popsicles.