Rose hips, elderberries and hibiscus flowers, These teas are caffeine free. Each packet contains 12 teabags. Elderberries are also a great source of vitamin C and contain more phosphorus and potassium than other temperate fruits. Rosehip may boost your immune system, reduce joint pain, and in the same way, protect against heart disease. Hibiscus contains antioxidants that can help to prevent cell damage caused by free radicals in the body.