Certified Gluten-Free. Caffeine free. Non-GMO project verified. nongmoproject.org. Blendmaster's Notes: Red Zinger: "We first introduced Red Zinger in 1972, and nothing around here has been the same since. The 'zing' comes from a blend of tart and tangy hibiscus, balanced by cool, refreshing peppermint and the unique, earthy sweetness of wild cherry bark. Try this perennial favorite on ice!" - Charlie Baden, Celestial Seasonings Blendmaster. Blending herbs, art and inspiration since 1969. The Story of Celestial Seasonings: Back in 1969, we started picking herbs from the fields and forests of the Rocky Mountains and at that moment, we created America's very first herbal tea. Still blended in Boulder y our expert Blendmaster, our uniquely delicious teas are made with the finest ingredients, passion and inspiration. "Eternal sunrise, eternal sunset, eternal dawn and gloaming, on sea and continents and islands, each in its turn, as the round earth rolls." - John Muir. nongmoproject.org. celestialseasonings.com. Tell us what you think: 1-800-351-8175 celestialseasonings.com. Made exclusively by Celestial Seasonings, Inc. The Hain Celestial Group, Inc. 4600 Sleepytime Drive Boulder, CO 80301-3292 USA. The Story of Celestial Seasonings Back in 1969, we started picking herbs from the fields and forests of the Rocky Mountains and at that moment, we created America's very first herbal tea. Still blended in Boulder by our expert blendmaster, our uniquely delicious teas are made with the finest ingredients, passion and inspiration.; Blendmaster's Notes Red Zinger "We first introduced Red Zinger in 1972, and nothing around here has been the same since. The 'zing' comes from a blend of tart and tangy hibiscus, balanced by cool, refreshing peppermint and the unique, earthy sweetness of wild cherry bark. Try this perennial favorite on ice!" Charlie Baden, Celestial Seasonings Blendmaster