The ShowerTimer, sold by a company in Australia, attaches to your shower head and sets the time you have to shower.
Only need 6 minutes a per pop - well then that’s all you’ll get. The water cuts off after a whatever amount of time you set the device. A maximum of 12 minutes can be timed and the shower stays off for at least 2 minutes after each cycle.
So you can either wait around and freeze (plus waste time) for two minutes or just make your way to work. You’ll need a job - the device is around $340.
Sounds like something you would do though, aop.