Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – UALANS Water Flosser Irrigator 300ml [EU] (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon right now! Check this out.
Link: Banggood product page
Coupon (29.74 USD): BG75597c
(CouponsFromChina.com tip: put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGd22d02, BGf3ba23, BGda2d1b, BG6677a8, BGb8ffce, BG825b1f, BG47b88b, BGef0f4e, BG589b2e, BG03e2d6
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – UALANS Water Flosser Irrigator 300ml [EU] (-3 USD)
Price history and price alert
Check out price history chart (for all/most countries) for UALANS Water Flosser Oral Irrigator 300ml.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).