Tunnel Plugs Australia - Open Hollow Tunnel & Speculum Butt Plugs

Tunnel plugs are hollow anal toys that keep your anal canal gently open during play or display. Unlike solid plugs, the open core allows airflow, visual access, or partial penetration through the centre—popular with experienced users who enjoy stretching, long-wear comfort, or partner exploration.

About Tunnel Plugs

Tunnel plugs are designed for users who want the sensation and stretch of an anal plug without the sealed, suction-heavy feeling of a solid sex toy. The hollow centre sits snugly once inserted, letting you breathe easily and allowing your partner or a second sex toy to access the opening if you choose. Most are made from flexible silicone or body-safe TPE, with a tapered tip for gentle insertion, smooth internal walls, and a wide flared base to keep the plug in place safely.

You'll find several variants within this category. Standard tunnel plugs offer a simple, open core for comfort and airflow. Textured models have ridges along the outer wall for added sensation during wear. Prostate Plugs sometimes feature a tunnel design to combine prostate stimulation with the hollow-core benefits. Hybrid tunnel plugs blend flexible and firm sections to balance comfort with stability, while metal or glass versions offer a visual contrast and firmer sensation for advanced users.

What makes Tunnel Plugs different

The hollow core is the defining feature. It reduces the seal and suction you'd feel with a solid plug, making them gentler for long-wear sessions and easier to remove. The open channel also lets you or a partner see inside, use a second sex toy without reinsertion, or apply aftercare products without full removal. Metal Butt Plugs offer a firmer, more visual experience, but tunnel plugs prioritise breathability and mixed-play options that solid designs simply cannot match.

Types of Tunnel Plugs

Tunnel plugs come in several distinct styles to suit different preferences and experience levels.

Standard Tunnel Plug. A simple, flexible silicone or TPE design with a tapered tip and open core. Ideal for first-timers exploring the category or users who prioritise long-wear comfort and airflow.

Textured Tunnel Plug. Features ridges or a ribbed exterior for added surface stimulation during wear. The hollow core still provides breathability, making this a good middle ground between sensation and comfort.

Metal or Glass Tunnel Plug. A rigid frame with an open centre, offering visual display and a firmer sensation. Glass Butt Plugs are popular in this style for their smooth, non-porous surface and elegant appearance. Best for advanced users comfortable with firmer sex toys.

Hybrid Tunnel Plug. Combines flexible and firm sections in one sex toy, balancing comfort during insertion with stability once seated. Usually made from dual-density silicone for a customised feel.

How they compare

How to choose a tunnel plug

Start by thinking about your experience level and what you want from long-wear play. If you're new to tunnel plugs, a standard silicone or TPE design in a smaller size (around 7–8 cm insertable length) is a forgiving first step. As you become more comfortable, you can explore textured variants or hybrid models that offer firmer support. Sizing matters: many users find they can comfortably wear a tunnel plug larger than a solid plug of the same width, because the hollow core reduces internal pressure.

Consider your play style next. If you're playing solo, a standard or textured tunnel plug offers simplicity and comfort. If you're playing with a partner who wants to explore the opening, choose one with a smooth interior and generous hollow space. Large Butt Plugs in tunnel form exist for advanced users, but don't rush sizing—go slow and let your body adjust. Check the material too: silicone and TPE are forgiving and flexible, while metal or glass demand more experience and confidence in your comfort level.

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 tunnel plugs, we've noticed a common mistake: people assume the hollow core means they can skip lubricant or use less. Wrong. Apply plenty of water-based lube to both the outside and inside rim before insertion. The open channel doesn't reduce friction on entry—it just means you'll feel less suction once you're seated. Go slow, let your muscles adjust to the expanding walls, and reapply lube if you're planning a long wear session.

Sizing down is often the right call with tunnel plugs. Because there's no seal, the sex toy can shift more easily, and the hollow core can feel roomier than you'd expect. Many customers who'd normally wear a 4–5 cm solid plug find a 3–4 cm tunnel plug equally satisfying and more comfortable for extended wear. Start conservatively, and you can always progress later. Rushing to a larger size often leads to discomfort and abandoning the sex toy altogether.

Cleaning the inside is non-negotiable. After removal, rinse the hollow channel thoroughly with warm water and mild soap, using a soft bottle brush or cloth to reach all surfaces. Any lubricant or body fluid left inside will degrade the material and create odour. For silicone and TPE, air-dry completely before storage. If you're mixing sex toys—say, using a second sex toy through the tunnel—check material compatibility first. Silicone and TPE play well together, but metal or glass against silicone can sometimes cause surface damage over time.

Care and cleaning

Wash your tunnel plug inside and out with warm water and mild soap after every use. Use a soft brush or cloth to clean the hollow channel thoroughly—this prevents lubricant buildup and keeps the sex toy hygienic. For silicone and TPE, avoid boiling or harsh disinfectants; they degrade the material over time. Metal and glass can tolerate hotter water and are non-porous, so they're easier to sanitise. Always air-dry completely before storage to prevent mould or mildew, especially in the hollow core.

Learn more

Tunnel plugs work brilliantly for solo exploration and partner play alike. If you're curious about how to introduce anal toys to your relationship, our guide on Introducing Penis Plugs To Wife covers communication and comfort strategies that apply equally to anal play with a partner.

Why shop Tunnel Plugs at Adultsmart

Ready to find the right one for how you play? Adultsmart stocks a curated range of tunnel plugs in different sizes, materials, and styles—from beginner-friendly silicone to advanced metal and glass designs. We ship discreetly to anywhere in Australia, with unmarked packaging and billing so your privacy is protected. Trusted Australian adult retailer — discreet, knowledgeable, and here to help.