I have one very tall, elderly patient with bad knees, so he doesn't like to sit down and then wind up hurting his knees when he has to stand up again. He uses a patio (outdoor) height bar stool in his shower. Waterproof. He put crutch tips on the feet of the stool so they don't slip. Very cool idea. My knees aren't that bad yet, but I will remember his tip for the future. Found them: https://www.amazon.com/SUPER-DEAL-Upgraded-Backyard-Footrest/dp/B07PP7295T/ref=sr_1_9?crid=1A8LNP8170JCZ&keywords=outdoor+bar+stools&qid=1565333267&s=gateway&sprefix=outdoor+bar%2Caps%2C137&sr=8-9