Idea: Shampoo Bottle

I was showering the other day and thought about what you can do in the 3 minutes that you're meant to leave conditioner on for. Wouldn't it be cool if there was a waterproof booklet attached to the shampoo bottle which had a book divided into chapters that each took about 3 minutes to read. Just so you're starting your day off to an intellectual start? Or maybe puzzles to warm up your brain before work?