Here at Cherry St Cat Rescue, we all talk about cat beds, which are popular, which are not. There are the expensive ones of course but they are hit and miss and then if a cat pees in them well it's hard to get that smell out.
I rely a lot on cardboard boxes, inexpensive, popular, and can be easily recycled and replaced when vomited or peed upon. Michelle though, has found another great one, an empty litter box with a blanket in it! And look, her foster kittens clearly agree.