Function International Public Co. Ltd. engages in the sale and distribution of water purifiers and water systems. It offers products under the brands of AQUATEK, Fast Pure, Hydromax, STAR Pure, Treatton, Uni Pure, Dosag Pump, and Ultratek Membranes. The company was founded by Vikorn Poovapat and Voraya Poovapat on January 3, 1997 and is headquartered in Bangkok, Thailand.