Hollow Stainless Urethral Sound
As evening settles and the world quiets, a private ritual begins with the cool weight of polished stainless in your palm. Its mirror finish catches the low light as you settle into stillness.
ways to enjoy the hollow stainless sound
1. Let the polished tip rest at the entrance, allowing the metal to warm before any invitation inward.
2. With a slow, intentional breath, guide the sound only as far as comfort allows, letting its own weight lead.
3. Pause in stillness, noticing the open channel’s subtle flow of sensation as the body’s quiet rhythm answers.
hollow, answered
What is this sound made of?
This sound is forged from solid stainless steel, then polished to a glass-smooth finish. Its hollow core creates an open channel for a continuous, subtle flow of sensation.
Which size should I choose?
The sound is offered in six sizes, from Size 1 to Size 6. Begin with the smallest and let comfort guide your progression.
How does the hollow channel feel?
The open channel allows for a continuous, subtle flow of sensation, so each movement feels intentional rather than abrupt. The result is a quiet, unhurried intensity.
specifications
related reads
- Wash with warm water and mild soap before first use.
- Apply water-based lubricant as needed.
- Clean thoroughly with toy cleaner after each use.
- Store in a cool, dry place, ideally in a pouch.
All orders ship in plain, unmarked boxes. Sender shows as "BL Fulfillment" — no brand references.
30-day satisfaction guarantee. Unopened items qualify for full refund.
Need help with a return, warranty claim or your order? Email support@binoku.com — we reply within 24 hours (Mon–Fri).

Kendra W. –
Bought this for my husband because he’d been curious about trying something with an open channel. His first impression was that it looked a bit intimidating, but after the first careful try he said the weight and balance made it feel much less fiddly than he expected. The hollow center was the detail he kept mentioning, and now it’s part of our occasional wind-down routine. Shipping was quick, box was plain, nothing about the outside gave away what was inside.
Tyler H. –
For thirteen bucks, I didn’t expect a lot, and mostly this delivers on the basics. The steel is smooth and the hollow channel is a nice touch compared to my old solid one. That said, my order showed up two days later than promised, and the open tip means I’m spending extra time cleaning the channel after each use. It works, but I keep reaching for my old one when I don’t want the fuss.
Colin R. –
After a few weeks with this, the finish really does feel flawless. It has a nice weight in hand, and the hollow channel adds a subtle shift in sensation I wasn’t expecting. I’ve used solid sounds before, and this one is easier to keep steady once everything is settled.
Mara T. –
Five weeks in, I still can’t find a single rough edge, and the hollow channel makes a bigger difference than I expected.
Paul V. –
Honestly, I was skeptical that a hollow sound would feel all that different, but it does. The steel is polished and balanced. My only gripe is that the fit took patience to get used to; I had to go slower than expected and use more lubricant than usual. Once I adjusted, though, it was worth the effort.