Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Xiaomi 500ml Vacuum Drinking Cup White (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (35.44 USD): BGHomeandGarden
Coupon (35.84 USD): vipupgrade8
Coupon (37.45 USD): aff7off
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Xiaomi 500ml Vacuum Drinking Cup White (-3 USD)
Price history and price alert
Price history (for all/most countries) for Xiaomi 500ml Vacuum Drinking Cup Black is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).