Cake Bandit - STP Briefs

by TG Supply

Cake Bandit's STP Briefs feature a 3-layer design that allows the wearer to use a stand-to-pee device safely. While they are designed specifically for use with the  STP Freely, these briefs can also be used with many other STPs, soft packers, and pack-and-play prosthetics.


Construction Details: Our STP underwear has a 3-layer construction.
The inside layer has a slit that acts as a barrier between your body and your STP device when it is not in use. Tuck the cup of your STP into the slit to give your junk some breathing room.

The middle layer has a reinforced round hole through which you can pull the shaft of your STP device. Once pulled through the hole, position the head and shaft of your STP in a downward position.

The outer layer of these briefs has an opening with two buttons. This layer keeps your STP hidden from view when you're changing or just lounging in your underwear. When ready to use your STP, unbutton this layer, pull the shaft out, and take your aim.
  • 92% Cotton, 6% Spandex
  • Wash cold with like colors - will shrink a little in a hot or warm wash
  • No Bleach
  • Tumble Dry on Medium Low - will shrink a little in the dryer


Small: 27"- 31”
Medium: 32”- 35”
Large: 36” - 38”
XL: 39” - 42”
2XL: 43”- 46"
3XL: 47"- 52”

Cake Bandit underwear uses standard US sizing.  


Customer Reviews

Based on 5 reviews

They have a weird shear kind of transparency and feel very thin. It does hold my STP in place, though, so it works at least.

River Morning
LOVE everything about them but..

I am absolutely crazy about every feature of this brief but they didn't fit quite right in the back and I had to keep tugging at them during the night.

Liam Hernandez
Effective, but prefer boxer briefs

Was excited for my briefs to come in, and while I do like them, I was not expecting them to be so roomy - previous briefs I have owned have been pretty tight everywhere which is what I like for packing because it keeps my packer from jostling around or even just sagging and looking big. Even the boxer briefs version seems to be tighter than these. These briefs are a different style where its more spacious. I think if I was taller (longer waist) and had a larger butt it would be perfect, but as someone short and with a smaller butt than i think ideally fits on this brief, the briefs werent as comfortable for me. I prefer the boxer briefs, but these are still nice for packing

Dylan Neil
Body Types Beware

Purchased these briefs along with the jock. Wanted to share my experience so other trans guys can beware, these really didn’t work for me in regards to STP functionality. Whenever im wearing these briefs and go to pee there is always backflow. i noticed the way the STP sits in these is a bit different than the jock, where the jock really holds me in place and keeps the STP where it needs to be to function, the briefs hold the STP at a different angle causing backflow almost every time. they’re definitely cute and comfortable, and i like the pocket and how the STP is kept off of my actual skin, but personally the jock works better for my body type and my STP.

Max Merrill

Seeing the other review about how roomy they are, I thought maybe they might work for me since I'm a curvy guy. Unfortunately, they fit like cheekster underwear. A good portion of either cheek hangs out of them.

I don't like how when I pack, the edges of the crotch are pulled away from my actual junk.

I bought these instead of the boxer briefs because the short inseam underwear tends to not fit me properly, but unfortunately these briefs don't fit me in the way I'd like them to, either.

These fit like women's cheeky underwear. I recommend the harness instead. I might try the boxer briefs in the future, especially if I see stp boxer briefs with a longer leg.


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 June.

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.