The product is light weight and can contain a lot of soap. A total of 4 glasses in general as instructed. Just follow the instructions comes with the package as instructed. This generated nice enough foam and detects the motion super easy. All you need to install is the batteries. The foam is nice and thick enough. Great thing is you can hang this to a well as well. This has a nice LCD display as well. Really a nice addition to the clean family with budget friendly. Kind of essential these days to keep your family safe.