Walex Toi-91798 Porta-Pak Holding Tank Deodorizer - Sunglow Pack of 2. This Hygiene and Sanitation from the experts at Walex is made using incredibly reputable materials and construction to provide you with a product that will do far more that stand up to the test of time. For an amazing way to ensure that you are using one of the better products the RVing industry can offer choose the Walex Toi-91798 Porta-Pak Holding Tank Deodorizer - Sunglow. Features of Walex Toi-91798 Porta-Pak Holding Tank Deodorizer - Sunglow Unbeatable odor prevention Breaks down waste and paper Biodegradable and Formaldehyde-free Drop a single Porta-Pak into the holding tank and add water Quantity: 2 Pack Package Contents: Walex Toi-91798 Porta-Pak Holding Tank Deodorizer - Sunglow Walex PPRV2: Toi-91798 Porta-Pak Holding Tank Deodorizer - Sunglow Pack of