Demo P-tainer
One demo P-tainer in the size and length of your choice — for filling a gap in your demo kit or trying a size before you commit to it.
Sizing tools for short term use. We do not accept returns on this item.
Made in Austin, TX.
Categories: P-Tainers , Spare Parts , Beginner Kits- Start Here!
Description
Demo P-tainer
Know roughly what size you are? This is the single demo piece, in the exact diameter and length you pick.
One Demo P-tainer in any size we make — 8 through 16, our standard +0mm length through +75mm, stepping in 5mm. Wear it to confirm a size before you buy the real thing, or to fill the gap between two sizes you have already tried.
Not sure what size you are yet? Measure first, so the one you order is the one that fits.
Why Try a Demo P-tainer?
Any Size, Any Length
Sizes 8 through 16, standard through +75mm
Steps in 5mm
Anything the Demo Kit skips is available here
Try Before You Commit
Wear it before buying the real thing
Marked on the Knob
Size and length printed right on the piece
Fits Our Accessories
Threaded end works with weights and straps
Made in Austin, TX
Designed and manufactured in Texas
Pick Your Diameter and Length
A P-tainer is sized in two directions:
- Diameter – the number most people mean when they say "size", and how wide the P-tainer is
- Length – how long the body of the device is. Most guys can use the default +0mm standard size. If you have 50% or more coverage, you’ll want one of the longer versions.
Follow our How to Measure guide to find your diameter, or take the P-tainer Length Quiz to work out your length. Demo P-tainers step in 5mm increments across the full length range.
Who This Is For
Most people should start with The Starter Kit, which sends a demo P-tainer in every size we make, each with a matching gripper, plus the tension gauge, bottle and string.
This is the single piece. It's the right buy when:
- You've narrowed it down and want to try the one option in between
- The Starter Kit stepped past your size and you want the 5mm in the middle
- You want a spare to leave somewhere
About the Demo P-tainer
Demo P-tainers are built to answer one question, which size is yours, and then hand off to the real thing.
- Marked with "DEMO" printed onto the P-tainer, and intended for short term use only
- Made with a non-heat resistant material, so it may deform if left in a hot car or run through the dishwasher, unlike our Dishwasher Safe P-tainers
- A lower print quality than our Dishwasher Safe P-tainer — bigger layer heights, higher print speeds and no post processing help us keep these priced low
- Nearly hollow to reduce shipping and manufacturing costs, however this means it’s less sturdy and durable than a Dishwasher Safe P-tainer
- Threaded end works with all of our accessories
- A sizing tool rather than a long term device, so we do not accept returns on this item
Once you know your number, the Dishwasher Safe P-tainer is what you'll actually wear day to day: smooth matte finish, high temperature resistant, and 100% solid for maximum heft. Most people eventually upgrade to the Stainless Steel P-tainer to take advantage of its built-in weight, unbeatable durability, and surgical tool grade hygiene.
More Information
Tips and Tricks
- Give it a real wear before you judge it, long enough to sit, walk around and forget about it
- New to retaining? Visit our How to Use Your P-tainer page for a complete guide
Care & Maintenance
- Wash the P-tainer and gripper with warm water and hand or dish soap before the first wear
- Demo pieces are not dishwasher safe. Hand wash only, and keep them out of hot cars
Ready for the Real Thing?
Once the demo piece has done its job, here's where to take it next.
Pocket Rocket Weight Sets
Discreet stainless weight from 4.5oz to 16oz, with everything you need to wear it.
Modular Weight Sets
Stack and adjust your weight as you progress, from 4.5oz up to 16oz.
Stainless Weights
Bulges, spacers and gear that thread straight onto your P-tainer.
Silicone Grippers
Stiff for active tugging, soft for all-day wear, in every size.
How it Works
Getting Started with Your P-tainers
Step 1: Clean Everything
Clean your P-tainer using soap without moisturizers (Dawn Powerwash works well), or use our Cleaning Kit for the best results. Wash inner and outer surfaces, rinse thoroughly, and dry with a lint-free cloth. Make sure your fingers are dry too.
Step 2: Prepare Your Skin
Ensure you are soft and your shaft skin is clean—excess skin oil can cause slippage. Pull back any foreskin to fully expose your glans.
Step 3: Check the Sizing
The P-tainer should cover about 50% of your glans. It's better to be slightly too small than too big. If unsure, learn how to measure.
Step 4: Position The P-tainer
Position The P-tainer with the V-shaped notch facing toward the ground. Carefully align the V shape with your frenulum and gently place it against your glans.
Step 5: Roll Your Skin Up
Roll your shaft skin up the body of The P-tainer as far as you can. You may need to gently grab your skin and pull it up to get it all the way to the neck of the retainer. If you can't reach the neck, your P-tainer may be too long.
Why Is a Gripper Required?
A gripper is a silicone band that holds your skin in place on the P-tainer. Without a gripper, the P-tainer will not stay on. The gripper is what keeps everything secure during wear.
Stiff vs Soft Grippers
- Stiff Grippers (fully clear) – Highest grip, great for adding tension with weights or straps
- Soft Grippers (opaque/cloudy) – Maximum comfort for all-day wear without tension
Comfort Fit vs Snug Fit
- Comfort Fit: Same size as your P-tainer – gentler grip, great for beginners
- Snug Fit: One size smaller than your P-tainer – tighter grip for increased hold
Daily Wear
- For best results, wear 8-12 hours daily
- Take a break every 2-4 hours
- Check circulation regularly
- Reposition the gripper if needed
Underwear & Pants
- Most underwear styles work for retaining
- Boxer briefs provide good support
- Add a bulge for a natural look under clothes
Activity Level
- Safe for most daily activities
- For swimming or running, use P-tainer only (no accessories)
- Sweaty? A snug fit gripper helps reduce slippage
- Take breaks – Remove the device every 2-4 hours to check circulation
- Stop if uncomfortable – Numbness, pain, or discoloration means remove immediately
- Keep it clean – Wash your device and skin before each session
- Start slow – Let your body adjust to wearing the retainer before adding tension
Have questions? Contact us for personalized help.
What's Included
This Product Includes:
- 1x Demo P-tainer – in the diameter and length you pick, with its size marked on the knob. Sizes 8 through 16, our standard +0mm length through +75mm, stepping in 5mm.
What to Add to Your Order
Silicone Gripper
Required to wear the P-tainer. Stiff for active tugging, soft for all-day wear.
The Starter Kit
Still narrowing it down? A demo P-tainer in every size we make, each with a matching gripper, plus the tension gauge, bottle and string.
Dishwasher Safe P-tainer
The dishwasher safe version, once you've settled on your size. This is what you wear day to day.
Dishwasher Safe P-tainer Kit
P-tainer, two grippers and a bulge together, so nothing is missing.