Place several blackberries, several orange slices, and several lemon slices in a carafe or pitcher. Add ice.
Pour filtered water over the fruit and ice. Place in the refrigerator to chill. Enjoy - the flavor improves after a couple of hours or more.
Notes
You can change out the water once you drink it, but the second pitcher of water will not have as much flavor as the first.If you keep reusing the fruit, you may notice a bitter taste from the pith of the orange and lemon. It's best to use freshly sliced fruit each time you want to make a pitcher of infused water.You can keep the infused water for 2-3 days, but I think it's best when it's freshly made.