How to Make It
Puree the cucumber, mint, lime juice, agave, and salt in a blender until smooth. Pour the mixture through a fine-mesh strainer, pressing with a spatula to remove as much liquid as possible.
Pour the mixture into 10 3-ounce or 8 4-ounce ice-pop molds, dividing evenly. Insert ice-pop sticks and freeze until firm, at least 4 hours and up to 4 days.