Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi Mijia 350ml Thermos [EU] (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (22.74 USD): Cuponation9
Coupon (22.99 USD): BG8ReviTrage
Coupon (23.49 USD): BG00c906
(CouponsFromChina.com tip: this code has to be applied in your cart 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): BGD22859, BGKTMJ13, AFfbG10, BGCUP1199, BG13thMI20, BGDQ15, BGXM859, BGD11C03, BGD22859H5, BGXM129, BGIL231, BG4BTLRA, BGZ2859, BGBW514, BGBTTRA, BGCAMP01, BGSEPSE409, BGHome15%, BGOC407, bGhOnEy10, BGOCTD407, BgcLuBofErtA10, BGHOMEA15%, BGRMJWB350ML, BGNOFR407, BGNOF407, BGELEHOME39, 13f142, BGAFF10OFF, DEFEFO407, BGTHFR407, BGCuponation10, BGMASE407, BGMRDC66, BGAPTD407, BGHONEY2110, BGAPFO407, BGAPSX407, BG10OFFAFF, BGMAYSE407, BGMAYTD407, BGAPSX4073, BGwhielabel, BGJUTD407, BGisly407, BGPDhome63, BG10OFFAFF1, BGSPHOME48, BGTY109AF, BGTY101B, BG0faeee, BG69193e, BGBWITHUS859, BG4d9120, BGTYOT407, BGUdb59, BGAlerabatod, BG1aecd4, BGTYOI407, 00c906, BG4283e5, BG7280ff, BG36e006, BGeb3f38, BG9b8951, BG2bb7a1, BG5d2ea4
(these coupons are old, so probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi Mijia 350ml Thermos [EU] (-3 USD)
Price history and price alert
Price history (for all/most countries) for Xiaomi Mijia 350ml Thermos is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).