Tisanes are 'teas' made with no Camellia Sinensis plant leaves. Peppermint tea, chamomile tea, rooibos tea, hibiscus tea, lemon verbena tea, and other teas are examples. The vast majority, if not all, are caffeine-free! A fun fact: caffeine is still present in decaffeinated coffee in small amounts, averaging around 3%. Caffeine is extracted from green beans using the swiss water method, carbon dioxide method, methylene chloride method, or ethyl acetate method while they are still green (pre-roast).