Cordless Water Flosser Just $8.99 Shipped on Amazon | One Charge Lasts Up to 30 Days!

By Cara | Staff Writer

Jun 04, 2026 @ 9:40 AM MDT

As an Amazon Associate, Hip2Save earns a small commission from qualifying purchases in this post. Amazon prices and promotions are accurate at the time of posting and subject to change. Read our full disclosure policy here.

For a limited time, head to Amazon where you can snag these COSLUS Water Flossers for just $8.99 shipped when you use promo code DL7A5UWR at checkout!

COSLUS Water Flosser in Black $29.94 (reg. $42.99)
Use promo code DL7A5UWR
Final cost $8.99 shipped!

water flosser and included accessories in case on countertop

This water flosser offers three modes: normal, soft, and massage. The extra-large tank holds over 10oz, and a quick 3-hour charge can last up to 30 days. It’s compact, lightweight, and easy to take anywhere.

*Note that a charging adapter is not included, but you can use any 5V adapter you may have on hand.

“For me, this water flosser is much easier and more convenient to use than string floss, which makes it easier to be consistent and use it daily. And, now that I’ve been using it, my dental hygienist says she’s noticed a definite improvement in gum health. I also appreciate that the company stands behind their product; when I submitted a question they proactively reached out and quickly resolved my concern, thank you so much. I would not hesitate to order from them again.”

About the writer:

Cara is a deal-loving writer with over two decades of experience across a variety of publications and digital platforms. She now creates fun, high-performing deal content readers love to click at Hip2Save.