FTM STP Guide: How to Choose & Use a Stand-to-Pee Device
Using an STP for the first time can feel intimidating. That's completely normal. The good news is that with the right device and a little practice, most trans men, trans masculine, gender expansive, gnc, and non-binary people find that STPs become second nature surprisingly fast. This guide covers everything from choosing the right device to the technique tips that actually work in real life.
What Is an STP?
An STP, or stand-to-pee device, is a prosthetic that lets you urinate while standing at a urinal or toilet. For trans men and trans masculine people, using an STP can significantly reduce restroom anxiety and dysphoria. Many STP devices also double as everyday packers, and some — like 3-in-1 models — can be used to pack, pee, and play. At Transguy Supply, we carry STP options ranging from beginner-friendly to advanced. Our most popular models are the STP Freely, STP Freely XL, and The Lou STP.
Choosing the Right STP
If you're new to STPs, start with the STP Freely. It's lightweight, affordable, and has a wide, forgiving cup that makes creating a seal easier while you're learning. It's the most popular first STP among our customers for good reason.
For a larger option with the same ease of use, the STP Freely XL offers more shaft length and a wider urethral opening — ideal if you have a fast or heavy stream. If you want a premium 3-in-1 that packs, pees, and plays, The Lou STP is built specifically for urinal use with its deep cup and angled shaft.
Fast stream? Go for a model with a larger urethral opening — the Freely XL and The Lou are both designed to handle heavier flows without backflow.
Step 1: Know Where to Position It
This is the most important thing most guides skip. Your urethra is not where you might think — it's generally located about an inch behind your clitoris, further back than most people expect. This is the single biggest reason people struggle with STPs early on.
The shaft of your STP should align with your urethra, not your clitoris. Take the time to figure out exactly where yours is before your first attempt. Once you know, positioning clicks into place fast.
Step 2: Practice the Right Way — In Stages
Don't take your STP straight to a public urinal. Work through these stages in order:
Stage 1 — Shower (water off)
Start naked in the shower with the water off. Practice creating a seal, let the flow begin slowly, and identify any leaks. Keep the water off so you can clearly tell what's pee and what isn't. The shower makes cleanup easy if something goes wrong.
Stage 2 — Toilet, no clothing
Once you've got the seal down in the shower, move to the toilet without any clothing on. This gives you a safety net while building muscle memory for positioning. Don't rush past this stage.
Stage 3 — Underwear on
Next, try with just your underwear on — ideally Cake Bandit STP underwear or a Cake Bandit harness, which hold your STP in the right position automatically and make this stage significantly easier.
Stage 4 — Fully dressed
Only once you're consistently clean in underwear should you add pants. Practice fully dressed in your own bathroom before going public. Once this is clean and consistent, you're ready for the urinal.
Step 3: Stream Management
If you have a fast or heavy stream, you may need to start and stop a few times during a single pee to let your STP drain. This is completely normal — it's like pouring liquid through a funnel. If the flow is faster than the drain, it backs up and overflows.
- Slow your stream intentionally at the start until the seal feels solid
- If you frequently have to start and stop, consider a model with a wider cup and urethral opening — the STP Freely XL and The Lou were both specifically designed for heavier flows
- Starting and stopping your stream repeatedly isn't ideal for bladder health long-term — if it's a constant issue, the device may not be the right fit for your body
Step 4: Clothing and Urinal Tips
Pants matter. Looser pants make STP use significantly easier. If you wear tight jeans, the zipper may not open far enough to position your STP correctly. If you can't or don't want to change your style, try unbuttoning your pants and pulling them down slightly at the urinal — just don't go too low.
Fly or drop trou? For most situations, dropping trou is faster and easier than threading an STP through a fly. The fly is worth using if you're wearing a belt, dress pants with a clasp, or work gear that's difficult to take off and on repeatedly.
At the urinal: Keep your STP angled slightly downward. STP-compatible underwear with a built-in fly opening makes urinal use dramatically easier and more discreet — you won't have to fish around to find your positioning mid-pee.
Step 5: After You Go
Give your STP a moment to fully drain before removing it — there's usually a little left in the cup. A quick dab with tissue before tucking back in takes care of any residual moisture. This is completely normal and not a sign anything went wrong. As a result, you won't end up with wet underwear from a properly drained device.
Hygiene and Care
Clean your STP after every use. Rinse with warm water and soap, or use the Packer & Toy Cleaner with Aloe Vera. TGS silicone STPs are also dishwasher safe — top rack, no detergent. For long-term storage, dust with Packer Renewing Powder to keep the silicone soft. Store in a cool, dry place out of direct sunlight.
If your STP has a persistent urine smell even after regular washing, try a diluted bleach soak: 10 parts water to 1 part bleach, 10 minutes, rinse thoroughly, and air dry completely. Because silicone is non-porous, this fully sanitizes without damaging the material.
What If It's Still Not Working?
If you've been practicing for a few weeks and still struggling, it's usually one of three things:
1. Positioning — You're placing the cup against your clitoris instead of your urethra. Reread Step 1 above. This is the most common cause of persistent leaking.
2. Cup size mismatch — If the cup is too small or shallow for your anatomy, you'll get leaks no matter how good your technique is. The STP Freely XL and The Lou both have significantly deeper cups than entry-level STPs — worth trying if the standard Freely cup isn't sealing for you.
3. Stream speed — See Stream Management above. If you've ruled out positioning and cup size, it's almost certainly your stream hitting the walls faster than your STP can drain.
One more option: if you're committed to a specific device but the shaft opening is too narrow for your flow, it's possible to carefully widen it with a hobby knife. This is a permanent modification — only do it if you're comfortable with the risk — but it can make an otherwise great device work for your body.
Pair Your STP With the Right Gear
An STP works best as part of a system. Cake Bandit STP underwear is designed with a functional fly and an internal sleeve that positions your device correctly — no improvising, no adjusting mid-pee. The Cake Bandit Harness is the move if you want to wear any underwear you like over it — including loose boxers.
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