The system of "bag-in-bag"

is about our original system put the bags-"bag-in-bag". This system will ensure that if you need to add a spare refill or will the upper part of the bag becomes dirty or damaged, it is possible to bag the "stripped" and balls safely supplement through feeding hole, or it is possible to wash the upper part or repair. Styrofoam balls so they remain inside another bag, and so they don't get out.