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 48 reviews
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.

Ty B

The Lou STP

Deb Dawkins

Very good product for the money. Bigger than I thought it would be.

Danny Liehr
Pretty good

Takes a moment to get used to but it's way easier to use than a few others I've tried. Hoping they can get the other colours in at some point.

Lucas AJ Sheen

Awesome I use it every day with no problems


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.


STP, Packer, Harness, and Underwear sales are final. All other returns are issued in store credit only.

International Orders

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