Hollow Dildos Australia - Penis Extension Hollow Strap-On Dildos

Hollow dildos are firm sex toys with a hollow interior chamber that slides over the penis or a strap-on prosthetic. They add length, girth, or structure during penetration, and work well for people managing partial erections or wanting shared sensation and control between partners.

About Hollow Dildos

Hollow dildos are sex toys built around a simple but effective design: a firm outer shell that fits over your penis or a strap-on prosthetic, giving you added length and girth during penetration. The hollow cavity creates a secure seal while the external shaft does the work. Most come with a flared base or harness mount to keep everything stable and aligned. Dildos come in many forms, and hollow designs are one of the most practical for partnered play.

Materials vary to suit different preferences. Firm silicone is body-safe, durable, and easy to clean. TPE or TPR offer a softer touch with mild compression for a snug fit. ABS plastic shells are lightweight and rigid, while Cyberskin and Real-Feel blends provide lifelike warmth and texture. PVC holds its shape well and allows colour variation, and rubber-core hybrids offer flexibility without losing pressure. Your choice depends on how much give you want and what sensation matters most to you and your partner.

What makes Hollow Dildos different

Unlike standard dildos, hollow dildos slide over an existing penis or prosthetic rather than replacing it. This means both partners stay connected—one person feels the external shaft, the other feels the internal pressure and warmth. They're built for function, not just appearance. Realistic Dildos prioritise lifelike detail and look, while hollow dildos prioritise the mechanics of fit, control, and shared sensation. The hollow design also makes them practical for people managing erectile variability or anyone wanting to add size without losing the feeling of direct contact.

Types of Hollow Dildos

Open-ended hollow dildos. The tip is exposed, so the head of the penis or prosthetic stays in direct contact with your partner's body. You get natural warmth, heat transfer, and skin-to-skin sensation. These suit couples who want maximum intimacy and feedback.

Closed-tip hollow dildos. A sealed extension covers the tip, adding extra length and a firmer feel. The closed design gives more structure and coverage, and works well if you're after pronounced size increase or prefer a more uniform shaft.

Textured hollow dildos. External ridges, veins, or surface patterns add friction and stimulation for the receiving partner. Non-Realistic Dildos often feature bold texture or abstract designs that amp up sensation without aiming for realism. Textured hollow models give you the best of both worlds: added girth plus extra sensation.

Harness-mounted hollow dildos. Built with an O-ring base or integrated mount, these attach securely to a harness. You get hands-free control, improved positioning, and stability during longer sessions. Ideal for strap-on play or when you want to focus on rhythm and depth without holding anything.

How they compare

How to choose a hollow dildo

Start by thinking about fit. Measure the insertable length you're comfortable with—most hollow dildos range from 12–35 cm. If you're new to hollow sex toys, start at the smaller end and work up. Girth matters too; it needs to be snug enough to stay put but not so tight it cuts off sensation or causes discomfort. Check whether you prefer an open-ended design for natural contact or a closed tip for extra firmness and length.

Next, pick your material based on how the sex toy will feel and how easy it is to clean. Silicone is the most forgiving for beginners—it's durable, flexible enough for comfort, and simple to wash. TPE is softer and more compressive if you like a gentler squeeze. If you want something rigid and lightweight, ABS plastic works well. For extra sensation, Cyberskin or Real-Feel blends add texture and warmth. Glass Dildos offer a completely different experience—they're firm, temperature-responsive, and non-porous—but they're not hollow, so they're a separate category worth exploring if you're after something with a unique feel.

Tips from the Adultsmart team

Hard-won pointers from the Adultsmart team, alongside our panel of sexologists, educators, and adult-industry contributors. Meet our experts →

After years of helping customers with hollow dildos, the biggest mistake we see is underestimating the importance of the internal fit. People focus on the external girth and length, but the hollow cavity needs to grip firmly without being restrictive. If the inner walls are too loose, the sex toy will slip during use and kill the momentum. Try starting with TPE or silicone if you're unsure—they offer enough flex to find a comfortable seal without being floppy.

Lubrication is non-negotiable, both inside and out. Apply a good amount inside the cavity before sliding in, and reapply as you go. The friction between the internal walls and the penis or prosthetic can be intense, especially with closed-tip designs. Water-based or silicone-based lubricant works well; just check your material first—silicone lube can degrade some TPE sex toys over time, so read the care instructions. Using a condom inside the hollow chamber cuts friction in half and makes cleanup so much easier afterward.

Harness-mounted hollow dildos are game-changers if you're doing strap-on play, but the fit between the sex toy's base and your harness matters. Measure the O-ring or snap attachment on both the dildo and your harness before buying. A loose connection will shift during use; too tight and you'll struggle to get it on and off. If you're new to harness play, start with a manual hollow dildo first to get a feel for positioning and rhythm, then upgrade to a mounted version once you know what works for you.

Care and cleaning

Wash your hollow dildo thoroughly with warm water and mild soap after every use. Use a narrow brush or irrigation cleaner to reach inside the hollow cavity and remove any lubricant or fluid. Let it air dry completely before storing—moisture trapped inside can encourage mould or mildew. Store away from direct sunlight and heat, which can warp the material or fade colours. Using a condom inside during play makes cleanup faster and protects the internal walls from wear.

Learn more

Hollow dildos work brilliantly for partnered play, and so do other creative designs. Read about Rotating Dildos That You And Your Partner Will Love to see how motion and mechanics can add a new dimension to your shared experience.

Why shop Hollow Dildos at Adultsmart

Looking for a piece that actually fits how you play? Adultsmart stocks a carefully selected range of hollow dildos in different sizes, materials, and designs—from open-ended to harness-mounted. Every order ships in discreet packaging with private billing so your privacy is protected. Trusted Australian adult retailer — discreet, knowledgeable, and here to help.