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MDI Australia Grow your own Willy Expanding Novelty Adult Party Gag Gift - Bachelorette and Bucks

MDI Australia Grow your own Willy Expanding Novelty Adult Party Gag Gift

$9.99
$9.99

Grow your own Willy creates hilarious party entertainment that expands up to 6 times, its original size in water. This cheeky novelty grows to 12 inches, over 72 hours, perfect for bachelorette parties and adult celebrations.

Key Features:

This novelty adult party item expands up to six times its original size when placed in water creating hilarious entertainment for bachelorette parties and adult celebrations.

Made from safe expanding polymer material that grows from modest size to approximately twelve inches within seventy two hours for maximum party impact and entertainment.

Perfect ice breaker for adult themed celebrations bringing together groups of friends and family members who may not know each other well at parties.

Provides endless photo opportunities and social media moments during the multi day growth process making it ideal for weekend celebrations and pre wedding events.

Easy activation process requires only room temperature water with growth beginning within two hours and reaching full impressive dimensions for unforgettable party memories.

Vendor: MDI Australia
SKU: NV-572-NOATTRIBUTES-SHOP-NONE-55062
Availability: Out Of Stock
Product type: Bachelorette and Bucks
Please hurry! Only 0 left in stock

Grow your own Willy brings ridiculous fun to adult parties with its expanding polymer that grows from tiny to 12 inches when you add water. This hilarious novelty creates endless laughs and photo opportunities for bachelorette parties and cheeky celebrations.

What It Does

The expanding polymer material starts working within 2 hours of hitting room temperature water, slowly swelling as guests watch in anticipation. Your modest Willy gradually transforms into an impressive 12-inch spectacle, reaching full size after 72 hours of soaking. The growth process becomes entertainment itself, with party guests checking progress and making bets on the final dimensions throughout the celebration.

Watching this dick grow creates a shared experience that breaks the ice between strangers and gets everyone laughing together. The absurdity of a slowly expanding penis sitting in a bowl of water generates constant conversation, photo opportunities, and increasingly dirty jokes as the night progresses. Groups bond over the ridiculous spectacle, creating memories that last long after the party ends.

Technical Specs

  • Grows up to 6 times original size
  • Made from safe expanding polymer material
  • Reaches approximately 12 inches at full expansion
  • Activates in room temperature water within 2 hours
  • Complete growth cycle takes 72 hours

How To Use It

Drop your Willy into a clear bowl of room temperature water and let the magic begin. Position the bowl somewhere visible so everyone can witness the transformation as it starts swelling within the first couple hours. The growth happens gradually, so you can start the process early in the party or even the day before for maximum impact during your celebration.

Use the growth timeline to create party games - have guests guess the final size, take time-lapse photos, or make it a centerpiece that everyone checks throughout the night. The slow expansion builds anticipation and gives you days of entertainment if you're celebrating over a weekend. Document the journey with photos at different stages for social media gold.

Who It Suits

Party hosts looking for that perfect icebreaker will love how this gets everyone talking and laughing together. Groups celebrating bachelorette parties, hen's nights, or adult birthdays find it creates shared moments that bond strangers into friends. Anyone planning multi-day celebrations can use the 72-hour growth cycle to create ongoing entertainment across several events. Skip this if your crowd is easily offended by penis humor or you need something that works instantly.

Who Makes It?

  • MDI Australia specializes in novelty adult products and party accessories that create memorable experiences
  • Visit the MDI Australia brand page →

Feature Breakdown

Feature Specification Sexual Benefit User Experience
Expansion Rate 6x original size Creates jaw-dropping reveal moments Guests gasp and laugh at transformation
Growth Timeline 2-72 hours activation Builds sexual tension and anticipation Party entertainment spans multiple days
Final Size 12 inches fully expanded Provides impressive cock comparison jokes Perfect prop for naughty photos
Safe Materials Non-toxic polymer Allows worry-free party fun Focus stays on laughs, not safety

Where It Fits in Our Range

Bondage And Fetish Gear

This novelty sits at the playful entry level of adult party accessories, perfect for groups dipping their toes into naughty fun without intimidation. While not hardcore BDSM gear, it breaks down barriers and creates the relaxed atmosphere that leads to exploring more adventurous products later in the celebration.

Browse all Bondage And Fetish Gear →

Sex Toys

Though purely for laughs rather than physical pleasure, this novelty complements any adult toy collection by adding humor and conversation starters. Party hosts browsing sex toys often need icebreakers that make their guests comfortable before introducing more intimate products into the celebration mix.

Explore all Sex Toys →

Expert Review from Our In-House Tester

Setting this up for my friend's bachelorette was dead simple - just dropped it in a fishbowl and waited for the show to begin. What caught me off guard was how invested everyone became in checking its progress every hour, with guests taking selfies next to the growing dick and making increasingly raunchy comparisons to their partners. Around the three-hour mark, it had doubled in size and the jokes were flying. By morning, this thing was massive and absolutely ridiculous looking, creating the perfect conversation piece for our recovery brunch. The whole weekend revolved around this stupid expanding penis, and honestly, it made strangers into friends faster than any other party trick I've seen. Total time from tiny to massive took the full 72 hours, giving us entertainment across multiple hangout sessions.

Reasons to Buy

  • 6x expansion rate — creates dramatic before and after moments
  • 72-hour growth cycle — provides entertainment across weekend celebrations
  • 12-inch final size — impressive enough for memorable photos
  • Safe polymer material — worry-free party fun without safety concerns
  • Instant icebreaker — gets strangers laughing and bonding immediately

Why Buy From Cock Ring Shop

  • Genuine MDI Australia products with full manufacturer warranty
  • Expert guidance on novelty items to help you choose the perfect Bondage And Fetish Gear for your needs
  • 100% discreet packaging — no logos, no hints about adult toys, total privacy
  • Fast, tracked shipping of Grow your own Willy across Australia
  • Perfect party planning support for creating unforgettable celebrations

Order your Grow your own Willy from the cockringshop today and transform your next adult party from ordinary to absolutely unforgettable. This expanding spectacle creates the perfect blend of anticipation and hilarity that gets everyone talking, laughing, and bonding over the most ridiculous party centerpiece ever.

Shipping Information & Policy


Cockringshop.com.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..

1. Major City & Metro Areas (within Australia)

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.

2. Rural Areas (within Australia)

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.

International Shipping

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.

Returns Policy


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, cockringshop.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

Frequently Asked Questions

How does the Grow your own Willy expand to its full size?
The expanding polymer material activates when placed in room temperature water beginning growth within two hours and reaching its maximum twelve inch size within seventy two hours.
What makes the Grow your own Willy suitable for adult parties?
Its humorous phallic design and impressive expansion creates an ideal conversation starter and ice breaker for bachelorette parties hens nights and risque birthday celebrations among consenting adults.
When should the Grow your own Willy be activated for maximum party impact?
Starting the growth process overnight before your celebration ensures it reaches full impressive proportions providing the most dramatic reveal and entertainment value for party guests.
Which features of the Grow your own Willy make it memorable for celebrations?
Six times expansion capability combined with its twelve inch final size creates jaw dropping reveals that generate gasps giggles and countless shareable photo opportunities throughout the party.
Does the Grow your own Willy work for multi day celebrations?
The seventy two hour growth timeline makes it perfect for weekend celebrations allowing guests to check progress at multiple events and building anticipation for the grand reveal.

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