$6.54 – 20L Foldable Backpack Ultralight (Banggood, Aliexpress: 20L Foldable Backpack Ultralight Outdoor Folding Backpack Travel Daypack Bag Packable Sports Bag for Men Women – Black (the best price with coupon)).
20L Foldable Backpack Ultralight is for $6.54 (in Banggood). Just check coupons out (with price alert and history). What is the best price?
Latest coupon and price update (UTC):
Banggood ($6.54)
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood. The question is – is it a good price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $6.42)
Link: Banggood product page
Price: $6.54
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG3661a0, Sports23q1, BG589b2e, BG4a87be, BG4844f4, BG1cb589, BGc28268
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for 20L Foldable Backpack Ultralight. The lowest price was: $6.01.
Price records source(s): 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)).