Years ago we had a waterbed, which was great for sleeping especially when we turned up the water temperature on a cold winter’s night. The full-body support made sleeping a dream, so that must have been the inspiration behind the Mediflow Waterbase Pillow. It’s a sleep aid that you fill with water for a desired firmness. It’s all explained very clearly at MediFlow.com; just be aware the loud music starts soon after you land on the page. And there might well be a downside eventually, although they don’t mention it anywhere; One night, during a deep sleep, we rolled over and put an elbow through our waterbed liner. The loud “Pop!” and resulting flood is something we won’t soon forget. We’re not saying it’ll happen with the MediFlow, but it could be a rude awakening.