Our line of AirWorks® Solid gel cup replacements offers true 30 day continuous odor control. They are made of a translucent EVA material that is designed to fit in all standard gel cup dispensers, as well as most passive air systems. Each is VOC compliant. AirWorks® Solid contains enzymes that continually work to eliminate odors at the source. We have three fragrances that are proudly produced in the USA. All three of our AirWorks Solid, gel cup replacement fragrances are part of our Complementary Air Care System, which allows you to have one scent throughout your entire restroom. Items in the complementary system include: • AirWorks® 3.0 Passive Air System • AirWorks® Metered Aerosol System • AirWorks® Urinal Screens • AirWorks® Bowl Clips • AirWorks® Hang Tags • AirWorks® Solid – Gel Replacement