I have 8 pillows and a raiser sometimes I use as many as 3 pillows on top of riser I have one of those pricey pillows with extra neck support but don't use it much I mostly have fiber fill pillows I scrunch and bunch maybe changing pillows during night I have never seen a water pillow sounds interesting I hated the buckwheat pillow gave it to a friend who loved it. You ladies got me think I may have to go to Jo anns and get a package of shredded foam and make my own pillow