Yerba Madre Revel Berry is a melodic blend of yerba mate, hibiscus, and yumberry, with notes of raspberry and blackberry, for energy to keep your spirits high. 150 mg caffeine. Yerba Madre formerly Guayakerba Mate is the nearly 30-year pioneer of regenerative yerba mate [yer-bah ma-tay] and the category leader in ready-to-drink mate beverages across North America. The name Yerba Madre, meaning Mother Herb, is a tribute to Mother Earth and the ancestral wisdom of the Indigenous communities who have cultivated yerba mate for generations a reflection of the values the brand has championed since day one. Using its Market Driven Regeneration model, every purchase helps reforest the Atlantic Forest, support fair trade premiums, and build long-term economic resilience for grower communities. As an original founding member of the B Corp community and a founding member of the Purpose Pledge, Yerba Madre is committed to ethical business practices across ten key pillars, including climate positivity, living wages, circularity, and inclusion.