There is no need to buy paper bags so often and it lasts for two years (based on 5 hours cleaning per week) and as for cloth bags, you only need to wash them once or twice a year. Vacuum is easy but when it comes to change the dust bags, it's so dusty and inconvenient. No more wandering around dust bag shelf looking for the right type of dust bag !! With Twister you only need to change your dust bag every 2 years. Container Loading(pcs): 5200/20' 10400/40' 12000/40H