We have a great sliding bench for bathing that swivels 360 degrees and slides. It really eased my back, neck and shoulder pain because I don't have to strain with showering/bathing any more. Plus it keeps my grandma safe from falls. You can even get a cheap shower curtain liner and then cut to lines up the sides to hang over the bench so that water doesn't get out of the tub. We got ours here: www.eaglehealth.com
Several people have purchased the SPLASHPAD® product for their loved ones, that needed extra help in taking care of themselves in the bathroom. The website is www.SplashPadShop.com for more information.