Essential oil diffusers are the cool, millennial version of a lava lamp. Turn on one of these sleek-looking machines and it transforms your room into a soothing haven that's serious #selfcaregoals.

Add Yahoo as a preferred source to see more of our stories on Google. photo-1537035448858-6d703dbc320f Indoor air can get a bit stale, especially during the chillier months, when you probably aren't ...