Step 1: Gather all your ingredients and popsicle molds. Wash and chop fresh fruits if using. If using frozen fruits, allow them to thaw for about 5-10 minutes to make blending easier.
Step 2: Add the mixed berries, chopped mango, chopped pineapple, and optional banana to a high-speed blender. Pour in 1/2 cup of your chosen liquid (coconut water or Greek yogurt).
Step 3: Blend on high until the mixture is completely smooth and creamy. If the mixture is too thick to blend or pour, add the remaining 1/4 cup of liquid, a tablespoon at a time, until the desired consistency is reached. Taste and add optional maple syrup or agave if a sweeter popsicle is preferred.
Step 4: Carefully pour the blended fruit mixture into your popsicle molds, filling them almost to the top, leaving a small space for expansion during freezing.
Step 5: Insert popsicle sticks into each mold. If your molds have covers with stick slots, secure them. If not, you can insert sticks after the mixture has frozen for about 1 hour to ensure they stand upright.
Step 6: Place the filled popsicle molds on a flat surface in the freezer. Freeze for a minimum of 4-6 hours, or preferably overnight, until the popsicles are completely solid.
Step 7: To remove the popsicles, run the molds under warm water for about 10-15 seconds to gently loosen them. Pull the popsicle stick to release the frozen treat. Serve immediately and enjoy!