Vacuum cleaners suck all the dusts clean, directly to its bag. Now comes the next inconvenience when the vacuum cleaner bags are full of accumulated dusts from weeks of sucking. The solution? It is no other than the bagless vacuum cleaner. It is also called canister vacuum. Without seeing the physical appearance of a bagless vacuum cleaner, it will make you think: if the vacuum cleaner has no bag, where do the dusts go? If there aren t any left at home, getting the model number of the vacuum cleaner and asking the sales clerk for help is the next best option. If the individual knows that this has to be replaced every 3 months, perhaps it is best to buy it in sets or in a pack so the customer does not have to make frequent trips to the store should this run out again. He thought that it would be even better if the device sucked it off instead. Testing his idea, he laid a handkerchief on a chair and then sucked it off. Upon seeing the dust that adhered to the handkerchief, he realized that his idea had merit. Puffing Billy is a rather large device that needs to be transported. Since the price of one unit is more than how much a person may earn in a month or year, people have to think about its mileage per gallon and other details before deciding to get it. The same thing goes when buying a vacuum cleaner. It may not be as expensive as a car but people who work hard for the money want to reap its benefits for many years before deciding to get another one. Various vacuum cleaners are the outcome of ingenuity and inventive skills of designers to alleviate hardship in doing household chores. Vacuum cleaners had been invented to remove soil particles in areas such as floors, walls and gaps, and carpets. Actually there is no actual sucking that takes place in the mechanism and technical concept of a vacuum cleaner. But if the individual does not have time, the store can go to the customer. Companies such as Electrolux or Kirby, has been doing this kind of business for more than 40 years. The marketing strategy used by these two companies is quite unique. Agents go house-to-house showing of the Kirby product line and after doing a free demonstration are able to impress the homeowner into buying a unit.