It is very common to flavor tea, then the mixture is called an infusion. Many infusions are old traditional mixtures that have been put together for a health-winning effect, but many are also composed for incredible taste. We use, as often as possible, only natural flavourings. So if we want to add raspberry flavor, we use real, dried raspberries, not artificial oil.
Remember that these are only mixtures with tea, we also have many herbal teas with great flavors !