For those of us who don't have the luxury of a bathtub but crave bath bomb-level relaxation, meet the best shower steamers. "What's a shower steamer?" You might ask. "What isn't a shower steamer?" We reply a little too enthusiastically. Shower steamers help you achieve a spa-like shower experience at home by popping a tablet at your feet, near or under the running water, and letting the aromatherapy get to work as the steamer dissolves.