$12.29 – Food-grade material with FDA Safety certification.
You can get Xiaomi SOOCAS Dental Floss 50pcs for $12.29 with coupon (from Banggood). Go down and check coupons out. Remember to check price history if it is available. What is the best price?
Latest price update (UTC time):
Banggood ($12.29)
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood. Is it cheap? From what I can see this price is higher than average price ($1.30).
Link: Banggood product page
Price: $12.29
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BGalex01, ML15%Pro, BG15%SP, BGSODF1, BGSODF2, vipupgrade8, BGAhmed02, BGSOOCASSEP, BGBFCR48, BGBFCR01, BGDouble11HC, BGHNY19, BG199775, BGSOOCAS18, BG2c5bs, BGAFF10OFF, BGXIAOMI811, BG11025, BG11716, BGCDMJU, BGCC0704, BGTJYE, BG10OFFAFF, 13f142, BG10OFFAFF1, BG6fe216, BG894ba1, BGaf10f7, 00c906, BG00c906, BG589b2e
(I don’t think these’re gonna work, but you can try ’em 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
Price history (for all/most countries) for Xiaomi SOOCAS Dental Floss 50pcs is here. The lowest price was: $0.99.
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)).