Amazon with PetPalatePro has the 4L VOLUAS Smart Automatic Cat & Dog Feeder w/ Desiccant Bag (Black) for $50 - $5 off coupon (check "Apply Coupon") - 50% off with coupon code YDY69SOW at checkout = $20 with free shipping on $35+ or with Prime. 

Also available in 6L size (black) for $25 after code YDY69SOW.