An alcohol free water-soluble solutions. Effectively kills disease-causing and odor-causing bacterial in the air. RE 3×15ml starter kits humidifier solution.Including:3 plastic bottles with 15ml fragrance oil for each. Size(/set):2.3×6.6×6.9cm3 flavor in one PVC box, they are lavender, rose, bamboo & lotus. Refreshen 3x15ml humidifier solution (starter kit)