W Water Purifier was designed to help customers to feel both retro style and modern style at the same time from modern sense of Northern European style. The direct filter change and self-developed battery for purifier were applied to save energy, and three types of filter and water purification circulation type invented by the company reduces the amount of wasted water. For easy adjustment of water quantity and water pressure, the level adjustment device was applied on a water purifier, and the double-bent water outlet was applied in a design for customers to use various sizes of cups and water bottles.