Herwiss Direct via Amazon offers the Herwiss Electric Makeup Brush Cleaner and Dryer Machine for $19.99. Coupon code "6B5VYHZA" cuts it to $12.99. With free shipping for Prime members, that's $7 off list and the lowest price we could find. It includes eight rubber holders of various sizes so you can wash virtually any makeup brush. Two AAA batteries are required but not included. Deal ends July 31.