Starbucks' Very Berry Hibiscus Refresher contains 60 milligrams of caffeine. It also contains 15 grams of sugar, and 70 calories. These are the nutritional facts per serving, which is equal to a 16 fluid ounce serving. The beverage consists of fruit juice, whole blackberries and green coffee extract, served over ice.
In comparison, the average 8-ounce brewed coffee has anywhere from 60 -120 milligrams of caffeine depending on how it is brewed.
So far, the new Starbucks refreshers have gotten mixed reviews. Some consumers liked the taste of the drinks, while others felt it was too watery and left an aftertaste.