Number One STP

Handmade platinum silicone — the STP that gets out of your way and just works.

The Number One STP is a handcrafted platinum silicone stand-to-pee device from Number One Laboratory — a specialist studio that's been making STPs for the trans community for years, entirely by hand, from the best materials available. Every unit is individually made and quality-checked before it ships.

The design prioritizes reliable flow over everything else. A wider hole in the shaft means you don't need to restrict your stream to avoid overflow — you can go at your natural pace without managing the device the whole time. The narrower bowl keeps the profile compact and packable. Made from platinum-cured body-safe silicone with a soft powder finish — the powder coating reduces that tacky silicone feel against skin and eliminates the need for packing powder during daily wear.

If you've heard of the Transthetics EZP, the Number One STP shares a similar style and shape — at a significantly lower price point. A solid choice for anyone who wants a handcrafted, community-tested STP without the premium price tag of higher-end handmade devices.

Currently out of stock. Use the "Notify me" option to be the first to know when it's back.

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📐 Product Details

Brand: Number One Laboratory — handcrafted STPs for the trans community
Material: Platinum-Cured Body-Safe Silicone with soft powder finish

• Length: 6.25 inches
• Cup Length: 3.25 inches
• STP Height: 2.25 inches
• Cup Width: 1.5 inches
• Shaft Circumference: 3.5 inches
• Wider shaft opening — no stream restriction needed for reliable flow
• Soft powder finish — reduces tacky silicone feel against skin
• Completely handmade — individually finished and quality-checked
• STP + pack function — compact enough for daily packing wear
• Boilable for full sterilization

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🎨 Choosing Your Tone

Number One Laboratory offers two skin tones. If you are lighter-skinned, choose "Light" — the "Medium" shade runs closer to a light tan and lighter-skinned customers are generally happier with the Light option. When in doubt, go lighter rather than darker for the most natural result against lighter skin tones.

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🩲 Best Pairings

The Number One STP was designed to be worn with Number One Laboratory's own Slingshot Harness — a low-profile thigh harness with no waistband that holds the STP securely between the legs. In addition, it works with:

• Cake Bandit Harness — secure positioning under any underwear
• STP Briefs, STP Boxer Briefs, or STP Jock — functional fly keeps your device positioned and ready

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🧼 Care & Cleaning

Platinum silicone is non-porous and one of the easiest materials to fully sterilize. Clean using any of the following:

• Hot water and soap — standard after-use rinse
• TGS Packer & Toy Cleaner — faster, conditions the silicone surface
• Diluted bleach solution — 10 parts water, 1 part bleach, rinse thoroughly
• Boil for 3–5 minutes — full sterilization
• Overnight denture cleaning tablets — soak, rinse, air-dry

Air-dry completely before storing. Store in a cool, dry place out of direct sunlight. For long-term storage, dust lightly with Packer Renewing Powder to maintain the soft surface finish.

Do not use silicone-based lubricants — they can degrade platinum silicone surfaces over time. Water-based only.

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🚿 First-Time Use Tips

The wider shaft opening makes flow management easier than narrower designs — you don't need to hold back your stream as aggressively. Still, every STP device handles differently. Work through these stages before going public:

1. Shower, water off — practice the seal with no clothing so you can clearly identify any leaks
2. Toilet, no clothing — build muscle memory for cup placement
3. Underwear on — a harness or STP underwear keeps the device correctly positioned
4. Fully dressed — once consistently clean at home fully clothed, you're urinal-ready

For the full technique guide, read our Complete STP Guide.

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❓ FAQ

How does this compare to the STP Freely?
The Number One STP is a handcrafted device from a specialist studio — different construction approach, different silicone feel, different aesthetic. The STP Freely is TGS's in-house design — softer, more flexible for packing, 3-in-1 compatible, and more skin tones available. Both use platinum silicone. Choose based on which design and style feels right for your body.

Is this good for packing as well as peeing?
Yes — it's compact enough for daily packing wear. The silicone is firmer than TGS soft silicone, so a snug harness or STP underwear helps keep it in position throughout the day.

What happened to Form Function?
Number One Laboratory was formerly known as Form Function — same studio, same handmade construction, rebranded.

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📦 Shipping & Returns

Orders typically ship within 1–3 business days in plain, unmarked packaging — no logos, no product names, nothing that reveals what's inside. Your bank statement will show "TG SUPPLY" only. Learn more about our discreet shipping promise.

All sales of STPs, packers, harnesses, pleasure toys, swimwear, and underwear are final due to legal restrictions. See our full Returns & Refund Policy.

All international orders are final sale. Local taxes, duties, and customs fees are the customer's responsibility. See Shipping Policies.