Onyx Hollow Core Urethral Sound
Candlelight softens the room as you prepare an intimate ritual. The Onyx Hollow Core Urethral Sound rests cool and smooth in your palm, inviting you to trade the familiar for a deeper, fluid wave of sensation.
ways to enjoy onyx
1. Begin with the smallest nozzle size, allowing your body to welcome the smooth, tapered tip at its own pace.
2. Coat the sound and the skin with a generous layer of water-based lubricant, letting warmth and slowness shape the first movement.
3. If using the syringe, introduce a soft, controlled stream of warm water or lubricant only after you feel fully at ease.
onyx, answered
What material is the Onyx made from?
It is crafted from body-safe premium silicone with a polished, non-porous finish. The smooth surface is designed for comfortable use and refined sensation.
How does the hollow core work?
The hollow channel allows a small, controlled flow of warm water or lubricant through the tip. You control the pace and pressure manually, so each session can be as soft or as deep as you wish.
Which nozzle size should I choose?
Choose the smallest size if you are new to urethral play, then move upward as comfort grows. The five-hole nozzle is available in small, medium, and large, in black or white, with or without a syringe.
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).
Eli R. –
The hollow channel makes fluid play much easier to manage than a solid sound. Smooth, simple, exactly as described.
Tessa B. –
I bought this for my partner after he mentioned wanting to try hollow sounds. He likes the smooth finish and the idea of the channel, but after a few tries he said the bore is narrower than expected, so fluid play took more patience. It also arrived with a slight discoloration near the tip compared to the photos. Not a total miss, but not our favorite from this shop.
Derek S. –
I’ll admit I was skeptical about a $10 urethral sound, but the Onyx won me over. The hollow core is the real deal for controlled fluid play, and the surface is smoother than I expected for the price. After a few weeks of regular use, it still cleans up nicely and feels comfortable with plenty of lube.
Marcus T. –
For the price, the Onyx is a solid entry into hollow sounds. The body-safe material feels nice, and the channel is precise enough for slow, controlled use. My only gripe is the tip could use a little more taper; it took a couple sessions before insertion felt natural. Shipping was also two days later than promised, though the box was plain and nothing was damaged.