Vac-U-Lock vs. GRIP vs. TPE: How to Choose the Right Motorbunny Attachment System

Quick answer

Choose Vac-U-Lock if you want a secure, standardized fit with a wide range of dildos; choose GRIP if you prefer strokers like Fleshlight; choose standard TPE attachments for a direct, skin-like feel with your Motorbunny. Consider your machine model and preferred stimulation type.

When you own a Motorbunny, the attachment system you pick shapes every ride. Vac-U-Lock, GRIP, and standard TPE attachments each have different strengths, and choosing the wrong one can lead to slipping, incompatibility, or frustration.

This guide breaks down the three systems, explains their trade-offs, and gives you concrete decision rules. You'll also find fit guidance so you can match the attachment to your Motorbunny model and your preferred sensations.

Understanding the three attachment systems

Vac-U-Lock is a standardized system from Doc Johnson that uses a hole in the base of the dildo to attach to a locking adapter. It's compatible with Motorbunny Original and BUCK models, and it gives you access to a huge catalog of dildos, including dual-density options like the Vac-U-Lock 8-Inch ULTRASKYN Cock White.

GRIP is Motorbunny's system for holding strokers like the Fleshlight Turbo Thrust Blue Ice. It's designed for hands-free use with transparent cases, so you can watch the action while the machine does the work. GRIP is ideal if you want oral or stroking sensations rather than traditional dildo rides.

Standard TPE attachments are the classic Motorbunny option. They offer a direct, skin-like feel and come in various shapes. However, they may not have the same locking security as Vac-U-Lock, and they require careful cleaning because TPE is porous.

Compatibility and fit: which system works with your machine

Before you buy, check your Motorbunny model. The Vac-U-Lock system is compatible with Motorbunny Original and BUCK models, so if you own either, you can use Vac-U-Lock dildos. The Vac-U-Lock 8 Inch Classic Dong White is a budget-friendly entry point for testing this system.

GRIP is designed specifically for Motorbunny Original and BUCK models as well, but it's not a universal adapter. It works best with strokers that have a compatible case, like the Fleshlight Turbo Thrust Blue Ice. If you're unsure, measure your machine's attachment area and compare with the product specs.

Standard TPE attachments are generally compatible with Motorbunny Original and BUCK, but they may require a separate adapter for some models. Always verify the product description to avoid surprises.

Material and sensation: TPE vs. silicone vs. ULTRASKYN

Material affects both feel and care. TPE is soft and realistic but porous, so it can harbor bacteria if not cleaned thoroughly. Silicone, like the MB Real "My Friend Dick" attachment, is non-porous and can be sterilized, making it a safer choice for sharing or sensitive users.

ULTRASKYN is Doc Johnson's dual-density material: firm inside, soft outside. It mimics real skin texture and is phthalate-free. For example, the Jason Luv 10in ULTRASKYN Cock offers a lifelike feel with a removable suction cup, adding versatility.

If you prioritize realism, ULTRASKYN or dual-density silicone are great. If you want easy cleaning and body-safe materials, silicone wins. TPE is budget-friendly but requires more maintenance.

Decision rules: how to choose

• If you want maximum dildo variety: Choose Vac-U-Lock. It's a standardized system with many dildo options, from classic to ultra-realistic. You can swap attachments easily. Go with Vac-U-Lock for versatility.
• If you prefer strokers or oral simulation: Choose GRIP. It's designed for Fleshlight-style strokers and gives you hands-free oral sensations. Make sure your stroker is GRIP-compatible. GRIP is your pick for oral play.
• If you want a direct, skin-like feel: Choose standard TPE attachments for a classic ride. They're often more affordable, but require careful cleaning due to porosity. TPE is budget-friendly but needs more care.

Product facts and why they matter

• Vac-U-Lock - 8-Inch ULTRASKYN Cock White: The 8" ULTRASKYN Cock & Balls is made from Ultra Realistic ULTRASKYN material with a dual-density design, soft exterior and firm core. It is phthalate-free and body-safe, and attaches to Vac-U-Lock harnesses. This gives you a realistic feel with the security of the Vac-U-Lock system, ideal for riders who want lifelike sensation without worrying about slipping.
• Fleshlight Turbo Thrust Blue Ice - Triple Entry | Motorbunny GRIP Compatible: This stroker features a triple-entry system that mimics lips, tongue, and throat simultaneously. When mounted to Motorbunny GRIP, the transparent blue case lets you watch the automated action hands-free. If you prefer oral simulation, this is the only way to get that experience with your Motorbunny. The GRIP compatibility ensures a secure fit during high-speed rides.
• MB Real "My Friend Dick" Premium Dual Density Silicone Attachment: Made with platinum cured body safe silicone, this attachment is 100% non-porous and easy to sterilize. It has a 6.5-inch shaft with a 4.75-inch insertable length. For users who prioritize hygiene and body-safe materials, this silicone attachment is a top choice. Its dual-density construction offers realistic feel without the porosity of TPE.

Fit guidance: who should choose which system

Best for

• Riders who want a wide selection of dildos and a secure locking mechanism—Vac-U-Lock.
• Users who enjoy strokers and want hands-free oral simulation—GRIP.
• Those who prioritize body-safe, non-porous materials—silicone attachments like MB Real.

Not for

• If you prefer a direct, skin-like feel without the bulk of a locking system, standard TPE might be more intuitive.
• If you want the easiest cleaning routine, avoid TPE and choose silicone.

Your Motorbunny attachment system defines your experience. Vac-U-Lock offers versatility and security, GRIP unlocks stroker play, and TPE gives a classic feel. Match the system to your machine and your preferred sensations, and you'll get the most out of every ride.