iPhone speaker....

... patent pending. Discovered by accident that music played on the phone can be amplified considerably by putting it inside a glass, which also protects it from splashes by the pool. I do not partake of poolside activities, because (a) I can't swim, and (b) there are too many steps down to it for my spazzy leg to cope with, but could enjoy (?) the music from a few hundred yards away on the terrace....