Experts share just how dirty your reusable water bottle straw is and what you should know about the bacteria growing on it. Whether at work, at the gym, at school or simply out running errands, most people carry around reusable water bottles to help them stay hydrated throughout the day. But most people don’t wash them as often as they’d wash a bowl or cup after using it. The thought is, if it’s only holding water, how dirty can it be? Turns out, very dirty. “There’s been studies that have