Every night, I drink a hot cup of Chamomile tea with a bit of honey in it before bed. Chamomile is a little herbal flower that is used to relax, or help indigestion etc. I also drink a glass if I have an upset tummy and it often is very soothing. That type of tea is not caffeinated.

Tea can actually be made of all kinds of ingredients. Taking the leaves or buds a plant and boiling it in water basically makes a tea. I'm not sure how they decaffeinate coffee and teas that naturally have caffeine. I know old herbal remedies often are various herbs made into infusions or teas. One kind of tea versus another can taste as different as night and day, it all depends on the plant used.