Water Temperature Display Thermometer (Banggood, Aliexpress: Package Contents: 1x Thermometer (the best price with coupon)).
Price history, coupons and price alert are available on this page. Do you want to know what the best price is?
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 code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
1. ($18.80): BG10OFFAFF1
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): 1b6883, 502C6B, 8caac4, fc0e28, e2bcea, vipupgrade8, TTxBG10, BGLW7, BGLW899, BGss8%hl, BGPW1028, bgssaff9, AFfbG10, BGCITYADS2019, BGBGHFRI15, BGIRGN12, 13f142, BGLK7888, BGHNED, BGVDay10%off, BGHOMEG12, BGAFF10OFF, bGhOnEy10, BGFING10, BGdragonBoat, bgshOOp10, BGHome15%, BGHOMEA15%, BgcLuBofErtA10, BGZASJJE48, BGLOSKII LW102, BGLOSKII LW102, BGHTJUT2, BGCuponation10, BGMA1604, BGMA1901, BGHONEY2110, BG10OFFAFF, BGwhielabel
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Water Temperature Display Thermometer is here. The lowest price was: $7.88.
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)).