OILSAO Electric Toothbrush with Water Flosser Combo in One,5

The Verdict

The One-Device Solution That Almost Nails It

Most 2-in-1 oral care gadgets feel like gimmicks. The OILSAO Electric Toothbrush with Water Flosser Combo in One isn’t one of them — but it’s also not flawless. At 3.8 stars across 190 ratings, this is a solid mid-tier device that solves a real problem (counter clutter) while making a few compromises you should know about before buying.

What’s Actually in the Box

Open the package and you get: the main handset with a 500ml detachable water tank, 4 brush heads (standard, soft, and two specialized ones), a flosser nozzle, USB-C charging cable, and a travel pouch. The unit itself is a single piece — the flosser reservoir snaps onto the base, and the brush head attaches to the top. No separate base station required, which is exactly the point.

Real-World Performance: The Good, The Loud, The Leaky

Brushing power: The sonic motor delivers 30,000-40,000 strokes per minute depending on the mode. I tested it against a Philips Sonicare, and honestly, the cleaning feel is comparable — plaque removal on the gumline was noticeable after three days of use. The 2-minute timer with 30-second interval pulses is standard but well-implemented.

Flossing function: Here’s where it gets interesting. The 500ml tank is a genuine advantage — most combo units force you to refill mid-routine. With the OILSAO, I flossed my full mouth, paused, and still had water left. The pressure is adjustable across 5 modes, and the lowest setting is gentle enough for sensitive gums without feeling useless.

The downsides you’ll actually notice:

• Noise level: At the highest floss setting, this thing sounds like a mini jet engine. A buyer named “DentalHygieneNerd” put it bluntly: “My wife woke up two floors away when I used the high-pressure mode.” That’s not an exaggeration based on my testing.
• The leak issue: The flosser nozzle requires a firm, deliberate click to seat properly. If you rush it — and you will at 7 AM — expect a few drops of water to escape around the connection. It’s cosmetic, not catastrophic, but it’s a design flaw that shouldn’t exist at this price point.
• Battery life: Realistically, you’ll get 7-10 days of twice-daily use per charge. The claimed 30 days is marketing math that assumes 1-minute sessions. Plan your charging accordingly.

What Buyers Consistently Praise

The counter-space savings is the overwhelming theme in positive reviews. One verified buyer wrote: “I live in a tiny apartment. This replaced my toothbrush and my separate Waterpik. My bathroom sink finally has room for my actual face.” Another reviewer highlighted the build quality: “The matte black finish feels premium, not like cheap plastic. The weight is balanced — it doesn’t feel top-heavy when flossing.”

Where It Falls Short (Real Talk)

Beyond the noise and leaking, there’s the maintenance factor. The 500ml tank is great for water capacity but a pain to dry completely — if you leave it assembled, you’ll get mildew spots within two weeks. You must disassemble and air-dry the tank after each use. That’s a 30-second habit, but it’s a habit.

Also, replacement brush heads aren’t as universally available as Philips or Oral-B options. You’ll likely need to order from the same OILSAO listing, which is fine, but don’t expect to find them at CVS.

Who Should Buy This

Buy it if: You’re in a small space, you want one device instead of two, and you’re willing to deal with a bit of noise for the convenience. It’s also a great fit for travelers who hate packing two separate oral care devices.

Skip it if: You have very sensitive teeth (the vibration can feel aggressive even on soft mode), you floss in the same room as a light sleeper, or you want something whisper-quiet for early mornings.

FAQ: 3 Questions Shoppers Actually Ask

Q: Is the water flosser as effective as a standalone Waterpik?
A: Close, but not identical. The pressure output is comparable at mid-settings, but the nozzle angle is less adjustable than a dedicated flosser. If you have deep periodontal pockets, you may prefer a standalone unit.

Q: Can I use the toothbrush and flosser at the same time?
A: No. It’s one function at a time — you switch modes rather than running both simultaneously. The “combo” refers to the device combining both functions, not concurrent operation.

Q: How often do I need to replace the brush heads?
A: Every 3 months, standard for all electric toothbrushes. The package includes 4 heads, which covers your first year. The flosser nozzle doesn’t need routine replacement unless it cracks or bends.

The Verdict

Rating: 3.7/5

The OILSAO combo is a genuinely useful product for the right person. It doesn’t outperform dedicated single-purpose devices, but it doesn’t need to — it needs to save space and deliver competent cleaning, which it does. The noise and minor leaking are real annoyances, but they’re manageable.

Buy it if you value counter space over silence and don’t mind a 30-second drying routine. Skip it if you’re a heavy-duty flosser or share a bathroom with a light sleeper. For everyone in between, this is a solid, honest value at its price point.

Where to Buy

👉 Check Price on Amazon →

We earn a small commission at no extra cost to you — this helps fund more honest reviews.

Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.