Kanberra Gel® is the most effective All-Natural Air Purifier on the market today. We take Certified Pure Tea Tree Oil and placed it in a Water-Based Gel so that it can evaporate. Thus becoming an airborne tea tree oil®. 100% Pure Australian Tea Tree Oil to Clean your home and keep your air healthy Certified by ATTIA. A proprietary blend of Australian Tea Tree Oils and other essential oils. Air movement takes Tea Tree Oil (TTO) airborne to remove odors. Gel stays effective for 30-90 days. 24/7 protection. Convenient jars available in a variety of sizes. Simply open the jar, remove the inner seal, and place where needed. Available 24 oz. refill pouch – reuse existing jars. PLEASE NOTE: All Gel products should be used within 12 months of the born on date. For reference, please look here.