Go down and check coupons out. Remember to check price history if it is available. What is best price?
Safe Material And Strong Durability, 500 ml
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon and price update (UTC):
Price history and price alert
Price history (for all/most countries) for Zanmini Stainless Steel Cola Vacuum Water Bottle 500ml is here.
Price records source(s): Gearbest
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)).