What is the capacity of Scrubba™?

The whole bag can contain around 3 gallons of water (13 L) but since the washing method requires you to rub the clothes against the washboard from the outside, the optimal working volume is around 1 gallon (3 - 4 L). There are markings on the front of the Scrubba™ Wash Bag to help you add the correct amount of water and clothes.