If you’re really into relaxing in the tub (and let’s face it, who isn’t?) then you might be interested in this Cylindrical Bath Pillow with soft terry cover. What’s nice is that the cover of this small pillow is removable so that you can wash it, and also features 2 suction cups that help keep the pillow in place behind your head. This probably would go great in a whirlpool tub, though it’d be fine in a standard tub as well.