It's great that you use your reusable water or hot beverage bottle every day, but you still should do one thing: Wash it properly every day as well. Germs and bacteria love moist environments, so when a bottle stays wet and doesn't get washed, illness-causing spores can germinate and sprout. It's not enough to swirl hot water around a bottle to get it clean; you need warm water and soap to properly disinfect both the inside and the parts that touch your mouth. The best method is to toss it in the dishwasher to make sure it's clean and properly disinfected.
ANDREWS MCMEEL SYNDICATION