Conserve water when you shower

(Recycling this post from Moni's Random Raves)

Turn off that shower! I seem to be saying this like one buzzillion times a week. My kids take the longest showers. Hello, the cast for High School Musical has already been picked and the movie made. The hot water can not possibly last that long. I don't know, maybe the California Raisin look is in these days.

Any who.... I was wondering if there was any sort of shower timer out there and to my amazement there is!!!! Now of course I could just set a cooking timer, but that would require me to add one more thing to my already too long list of things to do. I know the kids would never do it themselves.

I found The Shower Manager, a high tech device that attaches between the wall and shower head that is set for 5, 8, or 11 minutes for full flow water. Near the end of the set time of full flow a beep sounds then the water goes into a half flow mode signaling that it is time to get out. Once turned off for 5minutes the timer will reset for the next shower. Sounds nice but it is a little pricey at $114.99 and I don't know if there is a shipping fee (probably)....WHY?...Because they are all sold out....hmmmmmmmm

So the question here would be is the savings in water worth the cost of the device????
Wouldn't you know.....they have a water conservation calculator.