Costco Sale: Essenza Aromatherapy Ultrasonic Diffuser $19.99

*UPDATE* 5/10/17. This diffuser uses ultrasonic technology to turn water and essential oils into fine micro-particles, diffusing aroma as mist without heat. Plus, there are 14 multi-color LED lighting options. Costco has the Essenza Aromatherapy Natural Essential Oil Ultrasonic Diffuser on sale for $19.99 (after manufacturer’s instant rebate), now through May 15, 2017. That is $10 off Costco’s regular price of $29.99. While supplies last. Color selection may vary by location.…