ULTRAair Room Freshener Refills cannot spill or break and are easy to use. They are a great alternative to para, environmentally & VOC friendly, compliant in all 50 states, and contain no ozone depleting ingredients. Use with ULTRAair Room Freshener Cabinet or one of the following dispensers: TC®, TimeMist®, Hospeco®, Kimberly Clark and Vectair®.