This safe and economical cleaner from Zojirushi removes lime, scale and mineral deposit build-up from electric dispensing pots, air pots and carafes. A clean pot means proper water temperature and a fresh clean taste for beverages! This cleaner will extend the life of your appliance by keeping it clean internally! Not for use on aluminum. This item is safe to pour down the sink and will not harm plumbing or septic systems, is non-toxic and biodegradable. Sold in single packs of 1 ounce. For optimal results we recommend using 1 pack for each liter of capacity of the item being cleaned (example: a 4 -Liter capacity pot will need 4 packets of cleaner). You should clean the pot or appliance once a year if using bottled or filtered water or every 6 months for tap water. You are getting six one-ounce packets.