Insulation Performance Over 7h (Higher Than 62 Deg.C); Over 6h (Lower Than 10 Deg.C), Service Time More Than 3 Years, Waterproof Grade IP67, Diameter Of The Cup Rim 48 mm, Display Time Above 50000 Times, Display OLED, Capacity 525 ML, Weight 320g (Not Included Other Accessories).
Price history, coupons and price alert are available on this page. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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. ($36.13): BGAFF10OFF
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 2799CC, CCMINI, 502C6B, vipupgrade8, d8f2bb, TTxBG10, 2019SPEDM, aff7off, BGss8%hl, bgssaff9, BGKKF29, AFfbG10, affbg10, BG29KKC, BGBFAFF2019, BGCITYADS2019, BGHOMEG12, BGMPB2020, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGHome15%, BGHOMEA15%, BgcLuBofErtA10
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. China – Xiaomi KKF CC Smart 525ml Bottle Black ($-3)
2. China – Xiaomi KKF CC Smart 525ml Bottle Pink ($-3)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi KKF CC Smart 525ml Bottle Grey. The lowest price was: $24.79.
Price records source(s): Gearbest, 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)).