Request a Free 2 Minute Timer from Soap & glory. Just follow the link to their website and scroll down till you see the form. Fill in your information and they will send this Free timer to you in the mail.
From their site: At Soap & Glory, we encourage showering. (By selling a lot of shower gel.) Which is why we’re on a mission to mitigate the earth-challenging effects of our business: A 2-MINUTE MISSION.