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.  

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 28 reviews
Ray Mannel
Great Product for First Time STP

This STP is great for first-time users especially if you want a bit of length.

Stealth Transguy
Best STP for me

I have tried many STPs over the past 7 years. This is by far my favorite. The material isn't too rough so it won't hurt your skin as much if it's right up against your legs. The opening is wide and deep which is perfect since I have a fast and hard stream ( sorry if tmi ) The hole at the end is also fairly large to help with the flow to not back up and cause a leak. This STP is well worth the money, especially if you're a bit bigger down there and if you've got a faster / harder stream.

Darwin Torres
The most euphoria I've ever felt

((This is my first stp or packer, so this is based on my limited experience)) Getting it was so awesome and exciting. The boxing was descreet, it was softer than I expected (but still holds shape), the lip was helpful when peeing, packs well (I suggest up, and to your preferred side), and it's pretty realistic (particularly the shaft, the balls aren't as much). It made showering easier on dysphoria, and it's the first time in so long I can remember actually smiling with teeth. I'll never forget the first time peeing standing up. I really suggest it, especially for your first STP, as the pricing is good for what you get. It's not going to be perfect for everyone, but for me, I can confidentally say it was a life saver.

Elijah Merritt
The Lou

Love it!

Jacob Rodriguez

I just picked up my "package" and I'm really shocked at how good of a quality it is for the cost. It looks really good, doesn't smell like most packers/stp's, without a doubt does not need powdering, and holds its shape really well. I've had both 2nd and 3rd Gen peecock 3in1 and also 1 FreeTom stp and this one beats both of them at a fraction of the cost. I'm almost 6yrs into my transition and although I've had 3 stps, I've never been confident to use them cause they either pack super weird, prone to spillage or just too damn big. With the Lou it's easy to pack with(packing up) has a nice opening so no major back flow problems and overall a really well made product. I'm super happy I stumbled upon this company because they have made a very good stp at a great price which is honestly hard to find. Now I just have to master using it and I'll be good to go!
Ps. Works much better in pouch underwear and fly opening.


Transguy Supply is a small 2 person team. You can generally expect your order to ship within 7-10 days of purchase.

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.