I looked at this kind of thing a while ago: https://www.showersave.com/ https://www.showersave.com/ It seems like a no brainer, but the prices are so high (lik

I looked at this kind of thing a while ago: https://www.showersave.com/ https://www.showersave.com/ It seems like a no brainer, but the prices are so high (like £700 / $900) that it would take many many years to pay back the cost, so it wasn't worth it.