Waterbeds were most popular in America during the 1970s and early ’80s, but in more recent decades they have become scarcer. I can’t for the life of me figure out why, because these beds are easily the most comfortable I’ve ever experienced. As a child, I got used to the peaceful sloshing sound of the water every time I shifted my weight. Though the back support they provide is minimal, I enjoy sleeping in them all the same.

Of course the beds require a bit more maintenance than your standard piece of furniture. Every few weeks I peel back the waterbed sheet sets and add some conditioner to the water. This prevents stagnation and extends the life of the mattress. Without conditioner, algae can form inside the mattress and eventually cause cracking and leakage. It’s also important to maintain the proper water level.