ZeroWater 5-Gallon Water Cooler Filtration System Bring pure, great-tasting water to your home or office with the Culligan ZeroWater 5-Gallon Water Cooler Jug. Designed to work seamlessly with most standard water coolers, it features two 5-stage filters that remove virtually all total dissolved solids — so every glass is clean, crisp, and refreshing. Key Features Dual 5-Stage Filtration: Removes virtually all TDS — metals, minerals, salts, and ions Reduces Harmful Contaminants: Lead, PFOA/PFOS, chromium, and mercury Locked Lid Design: Prevents spills during refilling and transport BPA-Free Construction: Safe, food-grade materials throughout Eco-Friendly: Saves up to 660 single-use plastic bottles per year per filter Compatibility Compatible with most water coolers where the reservoir opening is at least 6 inches wide and 6 inches deep with no obstructions. Filter Life Approx. 15 gallons per filter (varies by water quality). Change filter when TDS meter reads 006.