For an extra touch of elegance, garnish each cup with a fresh mint leaf or a delicate spiral of lime zest before freezing. Feel free to experiment with different fruit combinations based on seasonal availability and personal preference. Berries, peaches, or kiwi would all be delightful additions. To prevent the fruit from sinking to the bottom, consider partially freezing the soda before adding the fruit. These cups are best enjoyed soon after freezing for optimal texture. If freezing for longer periods, wrap each cup individually to prevent freezer burn.