A water treatment device for filling at least one bottle with treated tap water includes a housing unit having a reservoir, and at least one valve arranged in fluid communication with the reservoir, the valve having a water inlet/air exit port arranged adjacent to the housing unit, and a water exit/air inlet port arranged opposite the water inlet/air exit port, whereby when the valve is actuated to its open condition, water flows through the valve and into the bottle, and air entrapped in the bottle flows through the valve and into the surrounding environment. When the valve is in its closed condition, air and water do not flow through the valve.