Premium. Acai Berry Herbal Tea. This fruity herbal blend combines tart hibiscus flowers with natural acai berry blackberry and blackcurrant flavors for a delicious tea that is also wonderful served chilled over ice. The small dark purple acai berries are from the Brazilian rainforest where they have been used for centuries by indigenous people. . . Explore Our World of Tea. Since 1972 Stash has been committed to providing premium quality teas and an unsurpassed tea drinking experience. Stash begins with simply excellent tea leaves from the World's premier tea gardens and all natural botanical ingredients gathered from around the world. Meticulous blending and tasting of every tea ensures you will enjoy full flavor in every cup.