$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)).
Right now the best price with coupon code for 20L Foldable Backpack Ultralight is $6.54 (in Banggood). Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the best price?
Latest price update (UTC time):
Banggood ($6.54)
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment. Is it cheap? Well, this price is higher than average price ($6.42)
Link: Banggood product page
Price: $6.54
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
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
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for 20L Foldable Backpack Ultralight? There we go. 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)).