Radenska is a naturally carbonated mineral water from Radenci in eastern Slovenia, long recognised by its 'three hearts' emblem and rooted in a nineteenth-century spa tradition. It surfaces intensely mineralised at around 3,500 mg/L and naturally charged with gas, giving it a deep, savoury character and a fine, persistent sparkle. This is a strongly mineral water with real presence, best served chilled and in measured pours alongside robust food. A historic Central European name rather than a manufactured seltzer, Radenska offers genuine source minerality and natural effervescence for drinkers who want a water with a distinct, mineral-driven personality.