Capicity 300Ml, Model YIJIE YG-01, Color White, Material PET, Size 25x 5.3x 5.3 mm, Weight 100g.
Basically copy coupon, view price history or create e-mail price alert. What is the 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 price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($9.89): BGAFF10OFF
2. ($9.99): 13f142
you should apply the coupon in your cart 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): 502C6B, konimbesinspray, 20He2bcea, vipupgrade8, TTxBG10, BGYI599, 2019SPEDM, bgssaff9, AFfbG10, BGYJ555, BG25GAGA, BGYJ675, BGYIJIE55, BGBFAFF2019, BGCITYADS2019, BGBGHFRI15, BGYIJIE59, BGOKG59, BGVDay10%off, 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)
Price history and price alert
Price history (for all/most countries) for XIAOMI YIJIE YG-01 Sprayer Bottle is here. The lowest price was: $4.5.
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)).