<unk>  An<unk>  is a device that<unk>  a controlled amount of soap solution (or a similar liquid such as a hand sanitizer). They are often used in conjunction with<unk>  faucets in public restrooms. They function to conserve the amount of soap used and stem infectious disease transmission.
Automatic soap dispenser
Hand sanitizer
Adult diaper
Cuticura soap
Composting toilet
Heat and moisture exchanger
Safety syringe
Tooth polishing