Rinse the guavas and remove the hard bottom part with a knife.

Coarsely chop the guavas.

Place the chopped guavas in a blender.

Add water and sugar to the blender.

Blend until the mixture is completely smooth.

Stir in the lime juice.

Strain the mixture through a fine-mesh sieve into a pitcher (optional).

Taste and add more sugar if desired.

Refrigerate until completely chilled.

Serve over ice.