VicTsing Upgraded Version Mini Electric Aromatherapy Essential Oil Diffuser $10.99
Amazon has the VicTsing Mini Electric Aromatherapy Essential Oil Diffuser priced at $23.99 and it ships for free with your Prime Membership (get one here free!) or any $49 purchase. Use code 3H9ZHXYX at checkout and save $13.00 off which drops the price to only $10.99. REALLY amazing price for one of these!
Amazon pricing changes frequently so this deal could end at anytime.