Aliexpress
Click here… to search for HomeRun 2L Pet Smart Pet Water Dispenser on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
Coupon (49.91 USD): 13f142
(CouponsFromChina.com tip: put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGPTWFJP, SKUE16923, AFfbG10, BGHU531, BGBAPOHG, BGPJPP, BGHHMJP, BGHOMEG12, BGJKLJP, bGhOnEy10, BGJJCWJP, bgshOOp10, BGHome15%, BgcLuBofErtA10, BGAFF10OFF, BGCuponation10
(there’s a little possibility that old coupon will work)
Price history and price alert
Price history (for all/most countries) for HomeRun 2L Pet Smart Pet Water Dispenser is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).