Fever-Tree Club Soda; Our soft English spring water is infused with only a touch of minerality, then highly carbonated to release a huge number of long-lasting, ultrafine bubbles. Similar to an aged Champagne with a finer fizz, this long-lasting gentle effervescence truly accentuates the flavor of the spirit & doesn’t over-power the sensory experience. Non-GMO certified. Gluten Free. Naturally sourced ingredients, no artificial sweeteners.