Designed to perform, the modern design of the refill is not only interesting but it's deliberate and the open-air design creates maximum surface area exposure and space for air flow which provides effective and efficient fragrance release | Freshness made simple, the refill is a solid that has been infused with natural fragrance oils so there's no messy gels or liquids, the eco air also works in many other popular dispensers | 100% recyclable : taking care of the planet is important which is why eco bowl clips are part of our closed loop recycling program, it's fast, easy and free | Freshen larger spaces for 30 days without the use of batteries.