ZeroWater's Water Cooler Filtration System saves your home or office money, storage space and heavy lifting. Simply pour tap water into the refillable bottle and watch as the 5-stage ion exchange technology removes virtually all dissolved solids for the purest tasting water. The refillable bottle fits most standard coolers to dispense hot or cold filtered water. The 5-stage filter transforms your tap water into delicious, TDS-free drinking water. All ZeroWater products include a free 3rd party Water Quality Meter to test your water to ensure the highest quality filtration on the market. Get more out of your water with ZeroWater's 5-Stage Water Filtration. 5-Stage Filtration: Stage 1 - Removes suspended solids such as dust and rust that make your water appear cloudy Stage 2 - Removes additional suspended solids Stage 3 - Removes organic contaminants; pesticides, herbicides, Mercury, Chlorine, Chloramine, and stops bacteria from growing Stage 4 - Removes inorganic compounds i.e. metals, nonmetals and radiological contaminants Stage 5 - Removes remaining suspended solids, holds the resin in place What is TDS: Total Dissolved Solids (TDS) refer to minerals, salts, metals including lead, chemicals, fluoride and runoff polluting your drinking water. ZeroWater Technology is the only water filtration system to remove 99% of TDS, equivalent to TDS in purified bottled water. Get more out of your water with ZeroWater's Premium 5-Stage Water Filtration. Color: blue and white.