The Bottom Line Rubber Butt Plug Black Model 4 brings fullness and hands-free exploration with 180mm height and 60mm diameter. Phthalate-free soft rubber construction with suction cup base for secure positioning and waterproof design for easy sanitization and aquatic use.
Key Features:
Suction cup base anchors securely to smooth surfaces for hands-free wear
Phthalate-free soft rubber construction prioritizes body safety and durability
180mm height with 60mm diameter for substantial fullness and presence
Graduated design allows body to adjust naturally to increasing fullness
Waterproof design enables aquatic use and easy sanitization between sessions
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Bottom Line Rubber Butt Plug Black Model 4 is a professional-grade anal plug designed for fullness and hands-free exploration. Measuring 180mm in height with a 60mm diameter, it features phthalate-free soft rubber construction with a suction cup base for secure placement. The waterproof design supports both aquatic use and easy sanitization, making it suitable for those seeking body-safe, durable anal play with stable positioning.
The Bottom Line Rubber Butt Plug Model 4 works through graduated insertion that allows the body to adjust naturally to increasing fullness. The soft rubber composition yields slightly during entry while maintaining enough firmness to hold its shape, creating a sensation that builds as you relax into it. The suction cup base anchors securely to smooth surfaces, enabling hands-free wear and creative positioning without constant manual support.
Phthalate-free rubber construction prioritizes body safety while delivering the weight and texture that differentiate quality anal plugs from disposable alternatives. The non-porous material resists odor absorption and maintains its smooth surface through repeated cleaning cycles. Those seeking additional options can explore our black butt plugs range at Adultsmart for alternative styles and sizes.
| Dimensions | 180mm height, 60mm diameter |
| Material | Phthalate-free soft rubber |
| Base Type | Suction cup for hands-free positioning |
| Waterproof | Yes, suitable for aquatic use and complete submersion cleaning |
| Texture | Smooth surface with graduated shape |
| Includes | Bottom Line Rubber Butt Plug Model 4 |
Pairing the Bottom Line Model 4 with external stimulation—such as a clitoral vibrator or perineal massage—creates layered sensation that many find significantly more intense than anal play alone. The suction cup base enables hands-free positioning, allowing you to focus attention on external pleasure points without managing the plug manually. Combining fullness with vibration or massage transforms how the entire pelvic region responds to stimulation.
After each use, rinse the plug under warm running water and wash with mild soap, paying particular attention to the base where lubricant residue accumulates. The waterproof construction allows for thorough cleaning, including submerging in warm water for five minutes to ensure complete sanitization. Store in a cool, dry location away from direct sunlight and extreme temperatures, ideally in a dedicated pouch to prevent dust accumulation and material degradation.
Bottom Line Rubber Butt Plug Model 4 is manufactured from phthalate-free soft rubber, a body-safe material that resists odor absorption and maintains structural integrity through repeated use. The non-porous composition prevents bacterial colonization and supports thorough cleaning without material degradation. Compatibility with water-based lubricants ensures safe, comfortable use, while the absence of sharp edges or seams eliminates risk of tissue trauma during insertion or extended wear.
This plug suits people seeking graduated fullness without extreme girth, offering a satisfying middle ground between smaller plugs and larger models. Those new to anal play benefit from the moderate size and forgiving rubber material, while experienced users appreciate the quality construction and suction cup stability. The hands-free capability appeals to solo explorers and partnered play, making it suitable for anyone interested in pressure and fullness sensations during solo sessions or with a partner.
For those frustrated by disposable rubber plugs that develop odors within months or crack under normal use, discovering that quality construction actually lasts years shifts expectations about what anal play products should deliver. The suction cup base eliminates the awkward hand fatigue that comes from manually holding plugs during extended wear—a problem that cheap alternatives don't solve. For people hesitant about anal exploration because they've only encountered low-quality options, experiencing a professionally designed plug with reliable materials removes barriers that prevented them from discovering whether fullness sensations actually work for their body. The difference between a plug that feels like a temporary novelty and one that becomes a trusted part of intimate exploration often comes down to material quality and thoughtful design details that this product prioritizes.
Our independent testers evaluated the Bottom Line Model 4 for insertion ease, base stability, material durability, and comfort during extended wear. The graduated shape facilitated smooth entry without requiring excessive lubrication, while the suction cup base held securely on tile and glass surfaces without slipping during repositioning.
Testers reported that the soft rubber composition remained odorless after multiple cleaning cycles and showed no visible material degradation after sustained use. The smooth surface texture minimized friction and supported comfortable wear for sessions exceeding two hours. Individual results may vary based on anatomy, sensitivity, and usage patterns.
| Product | Unique Advantage | Key Difference | Choose This If You Want |
|---|---|---|---|
| Bottom Line Rubber Butt Plug Model 4 | Suction cup base enables hands-free positioning on smooth surfaces | Only rubber plug with integrated suction cup stability | Hands-free anal wear without manual support |
| Pink Butt Plugs | Aesthetic variety in silicone construction for visual preference | Silicone offers different texture than rubber; no suction cup | Alternative material with broader color selection |
| Gem-Based Metal Plugs | Temperature conductivity and decorative appeal for visual stimulation | Metal provides weight and cooling sensation that rubber cannot | Temperature play combined with anal fullness and visual interest |
| Remote Control Butt Plugs | Vibration adds stimulation dimension beyond static fullness | Powered function requires charging; enables partner control | Vibrating sensation combined with anal plug for layered stimulation |
| Large Butt Plugs | Increased diameter for maximum fullness sensation | Significantly larger girth requires advanced comfort level | Extreme fullness and substantial pressure sensation |
Find our large anal play plugs to discover additional options in graduated sizing and materials.
Understanding proper insertion technique and relaxation methods significantly improves comfort and pleasure during anal play, transforming what might feel uncomfortable into an enjoyable sensation. Combining graduated sizing with patient exploration allows your body to develop comfort at its own pace rather than forcing progression. Our guide to anal play techniques offers detailed approaches and safety considerations for discovering what works best for your body. Read our comprehensive butt plug guide for detailed information on selection, insertion, and extended wear strategies.
Ready to experience hands-free anal exploration with professional-grade construction, the Bottom Line Rubber Butt Plug Model 4 is available at Adultsmart. All orders ship discreetly across Australia in plain, unmarked packaging with confidential tracking and processing.
Adultsmart.au ships with Australia Post. We ship from Sydney.
All in-stock orders placed before 12pm AEST (Sydney Time) on business days are generally processed on the same day. Packages are usually received 1-6 business days after shipping, but may subject to any postage carrier related delays beyond our control.
Free standard shipping on orders shipped within Australia above $200. For orders below $200 standard shipping within Australia is $12.95 and will be added at checkout.
Orders addressed to P.O box, G.P.O box or Parcel Collect will be handled by Australia Post. Extra time should be allocated for these orders.
Shipping Transit Times (Including Free Shipping)
Shipping time refers to the estimated time that it will take to deliver your order after it’s ready to ship (Please note this does not include time to process your order). Shipping time does not commence after your order is put through but begins the moment your order has been processed and is ready to dispatch via the our freight carrier..
All in stock orders are generally processed on the same day the order was placed on business days for orders received before 12pm. Generally, orders are processed and shipped the same day or next business day.
Orders are typically received 1-6 business days after shipping. For larger packages please allow an extra 1-2 business days for delivery.
If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from the nearest depot location.
All orders are generally processed on the same day the order was placed on business days before 12pm.
Generally, orders are processed and shipped the same day or next Business day.
Packages below 2kg are usually received 3-6 business days after shipping. For larger packages please allow an extra 1-2 business days for delivery.
If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from the local Australia Post depot.
The price for international shipping is AU$12.95 for orders equal to or below 0.399kg (399grams), and AU$22.95 for orders with a total weight equal to or above 0.4kg (400 grams).
All in-stock orders placed before 12pm AEST (Sydney Time) on business days are generally processed on the same day. Packages are usually received 6-30 business days after shipping.
If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from your nearest delivery depot.
Please note in regards to all orders
– These expected delivery dates/times are based on carrier shipping practices, your destination, and the items in your order.
– Expected delivery dates are estimates. Orders can be delayed due to fraud verification or the time of the order being placed. Items that are not regularly stocked cannot be held to the expected delivery dates.
– Orders may be delivered in separate shipments.
– The order cut off times are based on normal Business Hours and exclude weekends and Holidays: Monday – Friday 12 pm
– When your order ships you will receive an email from us with a link to track your order. If you receive your tracking number before 6 pm (AEST) it may not be updated on the Carrier’s website until that evening.
Due to large amounts of online credit card fraud, all orders are subject to approval by our payment verification department. We will notify you by phone or email should your order be delayed.
We have a 14 day return policy, which means you have 14 days after receiving your item to request a refund for any defective products.
Returns and exchanges are only available for faulty items, goods not as described, or in some instances, for incorrect sizing.
Due to health and safety regulations, Adultsmart.com.au cannot resell any returned or exchanged products.
This policy is in place to prioritise your well-being and ensure that you receive the highest standard of hygiene and quality in all products.
To be eligible for a refund, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging.
You’ll also need the receipt or proof of purchase. We do not issue refunds for change of mind or incorrect choice.
Under Australian Consumer Law, we are not obliged to accept returns for “incorrect choice” or “change of mind” so please choose your products carefully.
Any freight and insurance costs to return the item to us are at your expense. This includes the liability for any lost freight – send via registered post.
If your return request is accepted, we will provide you with all instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
We do not accept returns for any products that have change of mind, damaged products, or for products that have been used or do not have their original packaging.
Please get in touch if you have questions or concerns about your specific item.
Unfortunately, we cannot accept returns on sale items or gift cards.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 7 business days.
Please remember it can take some time for your bank or credit card company to process and post the refund too.