Guayaki - Yerba Mate Revel Berry - 16 oz. Guayaki Yerba Mate Revel Berry Guayaki (gwy-uh-kee) Yerba Mate (yer-bah mah-tay) is made from the leaves of the celebrated South American rainforest holly tree (ilex paraguariensis). For centuries, South America's Ache Guayaki tribe have sipped yerba mate daily from a traditional gourd for its powerful rejuvenative effects. These rainforest people find tremendous invigoration, focus and nourishment in yerba mate and revere it as the drink of the gods. Guayaki's Revel Berry is a flavorful tribute to the Ache Guayaki and their legendary beverage. BevNET Review: The Revel Berry flavor of Guayaki's canned yerba mate line is a pleasant mixture of USDA Organic and Fair Trade Certified ingredients including yerba mate, sugar, hibiscus, yumberry juice, and organic flavors. The product's flavor is like an exotic twist on raspberry iced tea, with the biggest difference coming from the earthy flavor of the yerba mate. It's smooth and clean, lacking the grassy flavor that you get from steeping your own cup of mate. Like the other canned offerings from Guayaki, this variety has 150 mg of natural caffeine per can, making it a pretty potent pick-me-up as well. The can features the same great format as Guayaki's other two canned varieties. In this case, the red accent color and illustration of a person are effective in terms of both catching the eye and helping the product achieve its authentic look. We're definitely fans of what they've done. Overall, a really well executed product that manages to be both mainstream and true to Guayaki's roots. The uplifting and nourishing choice of health-minded individuals, yerba mate boasts 24 vitamins and minerals, 15 amino acids and abundant antioxidants. Yerba mate is also known for its adaptogen-like qualities, which include reducing the effects of occasional stress.