Air beds are also known as blow up mattresses and are commonly used for camping as they are convenient and easy to carry. A lot of these air beds come with foot pumps but can be blown up in minutes with an electric pump. Air beds are also great for visiting guests.
Divans are very common and are less expensive than other types of bed. They are made from wooden covered with material and the mattress sits on top. Many divans come with built in drawers which provide plenty of storage space. Sofa beds are sofas which can convert into beds when required. They are great for spare rooms as they can be kept as a sofa and then pulled down into a bed if you have guests.