Omnipollo - Pleroma Brunch Bomb is a super sour from Sweden. Made with a generous amount of real fruit, and you can taste it.
 They say about it themselves:
 The Omnipollo weekend brunch is served! Pancakes stacked tall, unlimited supply of maple syrup and with only the brightest and best strawberries, raspberries and blueberries you can find. This version of Bianca has all the fruit intensity you would expect and more. Non-alcoholic.
 They also warn that the fruit can cause some sediment, so holding it upside down for a moment before pouring won't hurt.