In a large jug, combine the pomegranate juice and fresh lime juice. Stir gently to mix well.
Add the chilled soda water or tonic water to the jug and stir carefully to maintain the fizz.
Fill the jug with ice cubes to keep the drink cold.
Add fresh pomegranate seeds and lime slices to the jug for garnish.
If desired, add fresh mint leaves on top for an extra pop of flavor and color.
Serve immediately in glasses, ensuring each glass has a mix of the garnishes from the jug.