A bright, bubbly citrus base you can dress up with fruit, herbs, tea, or ginger. Make the base ahead; add bubbles to serve for maximum fizz.Prep Time: 10 minutes (plus 5 minutes for quick syrup, optional)Cook Time: 0 minutes (3–4 minutes if making syrup)Total Time: 10–15 minutesCourse: Drinks / MocktailCuisine/Style: Fresh Summer, Non-AlcoholicServings: 4Difficulty: EasyCalories (estimate per serving): 60IngredientsBaseFresh lemon juice: 120 ml (½ cup)Fresh lime juice: 60 ml (¼ cup)Cold water: 480 ml (2 cups)Simple syrup or runny honey: 60–90 ml (¼–⅓ cup), to tasteFine sea salt: ⅛ tsp (a small pinch)Sparkling water/club soda: 720 ml (3 cups), chilledIce: as neededFlavor add-ins (choose 1–2, optional)Watermelon purée (strained): 240 ml (1 cup)Cucumber (grated then squeezed): 150 g (1 cup lightly packed)Fresh mint or basil: 6–8 leavesPineapple or mango purée: 200–240 ml (¾–1 cup)Strong hibiscus tea (chilled): 240 ml (1 cup)Fresh ginger, finely grated: 1–2 tsp or 30 ml (2 tbsp) ginger syrupInstructions(Optional) Make quick simple syrup (1:1) and cool.In a large chilled pitcher, combine lemon juice, lime juice, cold water, salt, and 60 ml (¼ cup) syrup/honey.Add chosen flavor add-ins; muddle herbs lightly or stir in purées/tea/ginger.Fill glasses with ice.Gently stir in sparkling water.Taste and adjust with more syrup, citrus, or a tiny pinch of salt. Garnish and serve immediately.NutritionCalories: 60 | Carbs: 16 g | Protein: 0 g | Fat: 0 g | Fiber: 0 g | Sugar: 15 g | Sodium: 60 mgEstimates vary by ingredients used.