On the bottom of every plastic product, (including body lotion bottles, soda and water bottles, contact lenses, etc.), there is a number printed that corresponds to the kind of plastic used. If there is no number, the item isn't recyclable.
everydayactivist.com

Americans spend millions of dollars a year on bottled water, which adds to the amount of plastic containers thrown away every day. By purchasing a refillable water bottle and using fiiltered water, you can greatly reduce waste and save yourself a bundle! everydayactivist.com