Ona has been active in odor control since 1995. Their track record of success was made possible by the passion and excellence that they put into the making of the products. Odor control is their main objective, and they certainly do that well. Ona odor control comes in many different scents, shapes and sizes. There are Ona block, the Ona gel, Ona Liquid and even sprays are available. The beauty of Ona is that many of the products also work with evaporation, so you do not need a fragrance diffuser. Naturally, there are diffusers for Ona available.