A) 50 sachets of IASO tea can last a very long time if you are drinking only 2 cups per day as recommended. You can use just 2 sachets to make 1 gallon of tea. So 25 gallon of IASO tea can last a very long time if you are just drinking 2 cups per day. With 16 cups per gallon that will last you a good 200 days. That’s a lot of IASO tea to help you loose weight – Remember to refrigerate your extra tea.