Seems pointless and inconvenient for me as they usually seem to be poor quality, and can you really listen to music in the shower, and are you showering long enough to benefit from it?
Or do you own one and use for a different purpose, like swimming or Kayaking?
I have a waterproof Bluetooth speaker that was only like $20 and has surprisingly good bass. I bring it into the shower probably once a week for a longer self-care shower and jam out. Sometimes I use on the nightstand to help set the mood with my wife or bring it out to the kitchen if I’m prepping and cooking something that will take a while and I want music or a podcast playing.
[This](OontZ Angle 3 Bluetooth Speaker, up to 100 ft Wireless Range, Portable Speaker for iPhone, Android Phones, Louder Volume, Crystal Clear Sound, Rich Bass, IPX5 Portable Bluetooth Speaker (Black) https://a.co/d/jajmSHt) is the product I bought. There might be better ones out now since I’ve had it for a few years, so I’m not saying this is the best thing ever. It’s cheap enough to take a chance on imo, and I would feel comfortable giving it as a gift if that’s the real purpose of your question. I especially like that it has volume buttons and the ability to skip to the next song. The only weird thing I don’t like is that there’s a big jump in volume on the low end so it goes from being very quiet to being a solid medium-high volume. I only go about two notches higher than that when I’m in the shower with it.