You can get Xiaomi Mijia Portable Electric Heating Cup 2 350mL for $45.99 with coupon (from Banggood). Price history, coupons and price alert are available on this page. What is best price?
Latest price update (UTC time):
Rated Frequency 50Hz, Product Name Mijia Portable Electric Cup 2, Rated Capacity 350mL, Product Size 77*77*211.5mm, Product Model MJDRBO2PL, Rated Voltage 220V~
Banggood ($45.99)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. But wait a sec… Is it a good price? This price is higher than average price ($39.80) for this item.
Link: Banggood product page
Price: $45.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGa6a925
(you can check these old coupons out, but these probably won’t work)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Mijia Portable Electric Heating Cup 2 350mL.
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)).