The Lou STP

by TG Supply


The FTM STP designed specifically for the urinal.

We designed this STP 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. 

With an extra-long bowl and no-spill lip, The Lou is a great option if you have trouble with spills or finding the right placement of the cup. Made with the same ultra-soft silicone as all other Transguy Supply STPs - no powder necessary. 

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

Pair this STP with a Cake Bandit Harness that can be worn under any underwear or the Cake Bandit STP Boxer Briefs, which were designed specifically for using an STP.

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

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 66 reviews
Devon Dawes
solid packer!

i wear this with the cake bandit harness, and it does its job well! i was able to pee with minimal damage on only my second try, and this is my first stp ever!!! i do have to adjust it slightly from time to time, and it can be a bit tough to not have a tent in my pants, but that’s mainly just because my huge thighs don’t blend all that well with the larger cup. one thing i did not expect was how vividly i can feel sensations through the silicone- this model is not made for play so i have not attempted any sort of penetration, but god damn can i feel anything that touches it. usually, packing just felt like a foreign lump in my pants, but when i have this packer on, it genuinely feels like it’s a part of my body. i’m deeply impressed!

Kasha Lee

Love the softness. and the functionality.

Izuki Haruka

This is one of the best stps I’ve ever used. Then again, I haven’t really used many, but I won’t need to with this one.


the only STP that has worked for me and i couldnt be happier with how it makes me feel

Ty B

The Lou STP


Your order will typically ship within 2-3 business days after purchase.

**Our Warehouse is moving which may cause an extra 3-4 days delay in fulfillment and delivery times until the end of August.

Please note that print-to-order apparel items, such as t-shirts, hoodies, etc... require additional processing time and will be shipped separately.


STP, Packer, Harness, Swimwear and Underwear sales are final. They cannot be exchanged or returned due to legal restrictions. Please consult size charts carefully; Sizes vary between brands. It's recommended to get accurate measurements taken by a pal. All other returns are issued as in-store credit only.

International Orders

Please note that for all non-US orders, you may be charged local taxes to retrieve your order.

Additionally, all international sales are considered final. See our Shipping Policies for more details.