Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Model YM-K0301, Color Pink / White, Voltage 220V / 50Hz, Power 300W, Weight 400g, Material Stainless Steel, Capacity 320ML, Size 73x 73x 215mm
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
1. ($55.99): 13f142
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGXP631, bgshOOp10, bGhOnEy10, BGHome15%, BGHOMEA15%, BgcLuBofErtA10, BGAFF10OFF, BGCuponation10
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for VIOMI Pro 2 In 1 Electric Water Heating Bottle 300W.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).