A: Dual frequency noise reduction earplugs, C: Aircraft earplugs, B: Foam earplugs.
Aliexpress
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Here are coupons that you can use.
Updated: 08-07-2025
Banggood
Warehouse in China.
Link: Xiaomi Jordan Judy Earplugs
$11.80 with coupon: 2022ACTIESNL
$11.93 with coupon: BG00c906
Additional Banggood coupons:
1. First page
2. Second page
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Jordan Judy Earplugs. The lowest price was: $2.99.
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)).