Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 79b65b, 2282CODE, 30Can, BG855pump, BG20COOP, BG799pump, BGKT3566, AFfbG10, BGWP89, BGCITYADS2019, 13f142, BGWP972, BGVDay10%off, BGKCASAFB, bGhOnEy10, BGWER452, BGAFF10OFF, BGdragonBoat, BGSS10%SW, bgshOOp10, BGHome15%, BGKCASA20%, BGHOMEA15%, BGNOFR795, BgcLuBofErtA10, BGJATD795, BGFEFR796, BGFETDWEEK795, BGMARFR795, BGCuponation10, BGMRDC74, BGMAFFO795, BG10OFFAFF, BGwhielabel, BGKU795, BGis795, BGISJU795, BGPDhome67, BG10OFFAFF1, BANGGOODSD
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for KCASA Electric Water Dispenser.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).