iKOU Diffuser Reeds Zen 250mlA balancing blend of Green Tea & Cherry Blossom This fresh, gentle, cleansing blend is designed to promote positive thoughts, refresh the mind and remove mental fatigue. iKOU reed diffusers last up to 9 months, with eco conscious refills available. For best results we recommend get the refill with your initial purchase to keep the bottle topped up and full rather than waiting until it runs out.