Big D PREMIER RESTROOM PRODUCTS are made from a specially engineered copolymer impregnated with a powerful organic odor-counteracting compound. They are available in the seven enticing Big D Premier Scents ? fragrances that match and compliment each other. THE D-TOWER REFILL is the exciting passive deodorant cartridge designed to fit THE D-TOWER DISPENSER (sold separately). Use for freshening the air in any size space. Forget about liquid spills or accidents, as the solid design of the cartridge eliminates the mess. No batteries are needed. THE D-TOWER REFILL will keep any area smelling fresh for 30 to 45 days and is made from 100% recyclable material.