What to use instead of a cot?

What alternatives are available for individuals seeking a sleeping solution that is not a cot? Could an air mattress or camping bed be a viable option? Are there any benefits to using a foldable sofa or futon as a substitute? Additionally, how does one determine the most suitable alternative based on factors such as space constraints, durability, and comfort? Lastly, what are some of the potential drawbacks or limitations of each alternative, and how can they be mitigated?