The Lou STP

by TG Supply


The FTM STP designed specifically for the urinal.


We designed this STP - The Lou, (in honor of Trans Trailblazer Lou Sullivan and a nod to the British term "loo" meaning bathroom) - to be extra urinal friendly. The angle of the shaft on this model points out and down rather than just down, so it hits the urinal just right. 

We also made the cup rise up a little taller and a little wider in the back in order to prevent potential spills. This STP is a great option if you find you have trouble with spills or with finding the right placement of the cup. 

The Lou is made with the same ultra-soft silicone as all other Transguy Supply STPs. 

If you are a fan of the EZ Pee or the Santos, you'll definitely want to check out this model. 

The Lou is smooth and soft to the touch. It's never sticky, even after washing, and will never need powdering. 

Pair this STP with a Cake Bandit Harness that can be worn under any underwear or the Cake Bandit STP Boxer Briefs which we’re designed specifically for using an STP without the need to take your underwear down.

100% Body Safe Silicone

- Shaft Length (measured from top): 3.5 inches
- Shaft Length (measured from bottom): 3.5 inches
- Cup Inner Width: 1.75 inches
- Cup Outer Width: 2.5 inches
- Cup Inner Length: 3"
- Cup Outer Length: 4"
- Shaft Circumference: 3.5 inches
- Weight: 5.5 oz
Silicone may be cleaned using any one of the following methods:
- Hot water and soap
- Diluted bleach
- Running through the dishwasher

We recommend packing up or down with this STP. Best when used with the Cake Bandit Harness or Cake Bandit STP Underwear. It also fits nicely into the regular Cake Bandit and Jockmail Packing Underwear for all-day packing but you would need to pull it out of the pouch to use the STP function.

Please note that although The Lou is made with super-soft silicone, it is designed to hold its shape when in use. This means that you will need to use a harness or tight underwear to keep this STP compressed in your preferred packing position. Wearing any Transguy Supply-made STP with loose boxers will create the appearance of an erection in your pants. 

Note for first-time users, we strongly recommend that you practice in the shower before attempting to use it in public. Even if you have had success with other STPs in the past, every STP is different and requires some getting used to. 

For info on how to use an STP device, check out these 11 Essential Tips.

Customer Reviews

Based on 39 reviews
Lucas AJ Sheen

Awesome I use it every day with no problems

Salty Squid
Good Quality STP

I just transitioned a few months ago, but one of the things that I knew I wanted was to pee standing up, and now I can. Almost every time I’ve done it, I managed to get more on myself or the floor than in the actual toilet, but that’s user error and not fault of the product; I’m not sure where to position it yet. But practice will help with that.

If you have olive skin like me, I’d recommend a #2 (not shown here, but it’s the same color as a #2 STP freely) or #3. The #3 is a little darker than I am, but I don’t mind.

Cherokee Hines
Shaft is too short

I like that the cup opening is wider than all the the other model STPs. I makes it easier to position and to go. I like that the urethral opening is large enough for the drainage to be damn near instantaneous - I don't have to hold back. However, I find the length of the shaft too short for me. If you can, please consider producing an STP with this exact style of cup opening with the same options for un/circumcision and shaft length as you do the STP freely etc... That would be in my opinion ideal.

Van A.
Very easy to use STP

I'm still pretty new to using an STP and this is only me second one but this seems to work really well. Much easier learning curve, soft and comfortable to pack with too

Great color and it's supper soft!

I love my stp it was super soft and I liked the color match great. I did have trouble peeing into it at first but I was a first time user so no fault to the product. It packed really well and made me feel atot less disphoric 10/10 would recommend


You can expect your order to ship within 2-3 business days after purchase. Print to order items, such as t-shirts, will sometimes take longer and will ship separately.

Final Sales

Please note that due to the sensitive nature of the items in question, all STP, Packer, Harness, and Underwear sales are final. Please make sure you have double-checked product size guides and have selected the correct item.

International Orders

Please note that for all non-US orders, you may be charged local taxes in order to retrieve your order. See our Shipping Policies for more details.