Fake Pee, Fake Urine, Synthetic Urine: What It Is and What Is in a Kit

Fake pee, fake urine, synthetic urine: many names, not one standard

Shoppers call this product fake pee, fake urine, synthetic pee, artificial pee, and sometimes fake piss. Manufacturers and laboratories call it synthetic urine. The names are interchangeable; the products behind them are not. Synthetic urine is any manufactured liquid made to stand in for human urine, and each manufacturer decides what goes into its own. We can speak only for Upass: it carries the components found in human urine, a pH inside the human range, a realistic specific gravity, and organic markers including creatinine, urea, and uric acid, together with other compounds that reproduce the profile a urinalysis panel measures. Whichever name you searched for, that is what to ask of any kit, and it is what is in ours. Here is the full manufacturer's explanation of synthetic urine.

What is in a fake pee kit?

A complete kit has three parts: the liquid, a way to warm it, and a way to read the temperature. Every standard Upass kit contains a premixed 3 oz bottle with the Upass logo embossed in the plastic, two Hot Sacks air-activated hand warmers, an adhesive temperature strip, a dispensing cap, and a rubber band. Nothing to mix and nothing to measure. Sealed bottles carry a 2-year shelf life, and the expiration date is printed on every box next to the lot number.

Premixed means the bottle arrives as a finished liquid, tested by the manufacturer before it ships. Powdered products arrive dry and must be combined with water, which adds a preparation step and a source of error. What a complete kit with a warmer contains, item by item.

How is fake pee warmed, and how do you read the strip?

The working range is 90 to 100 degrees F. Shake the bottle, warm it for about 5 seconds in a microwave, then secure one of the included hand warmers against it to hold the temperature. Without a microwave, an air-activated hand warmer alone brings the bottle into range in roughly 45 to 60 minutes and holds it there for up to 8 hours. The adhesive strip shows the current temperature; a blank strip means the bottle is above or below the range, so adjust in small steps until a reading appears. The official step-by-step instructions are here.

What does genuine Upass look like?

Every genuine Upass bottle has the Upass logo embossed in the plastic, every standard kit includes two Hot Sacks branded hand warmers, and every box is printed with a lot number and expiration date next to the UPC. Treat these as a quick look rather than proof. Safeguard Labs filed six federal enforcement actions in 2025 against alleged counterfeiters and unauthorized sellers, and undated or unbranded stock is the pattern those cases share. How to check the lot number on your box.

Where can you buy fake pee?

Upass is sold nationwide at authorized retailers, but not on Amazon or at Walmart. Online, upassurine.com is the only authorized store, and Safeguard Labs authorizes no marketplace or reseller listings online. Ordering direct, Upass is in stock and orders placed by 3:00 PM PT Monday to Friday ship the same business day. The 2-Pack and 3-Pack ship free. Where to buy synthetic urine, and what to check before you do.

What is fake pee used for?

Synthetic urine is sold for lawful uses: calibrating and validating urinalysis equipment and dipstick panels, scientific research and product testing, medical and laboratory education, demonstrations, and adult novelty use. Buyers are responsible for compliance with applicable laws, which vary by jurisdiction.

Frequently asked questions

Is fake pee the same as synthetic urine?

As names, yes. Fake pee, fake urine, synthetic pee and artificial pee are consumer names for the product category sold commercially as synthetic urine. As products they differ by manufacturer; what is in Upass is described above.

Is Upass fake pee?

Upass is the premixed synthetic urine kit made by Safeguard Labs since 2009, and fake pee is what many customers call synthetic urine, so if you searched for fake pee, Upass is what you were looking for. What sets it apart is what is in the bottle: the components found in human urine, balanced pH, realistic specific gravity, and organic markers including creatinine, urea, and uric acid, with every batch quality-checked before it ships.

Does fake pee expire?

Yes. Sealed Upass bottles carry a 2-year shelf life with the expiration date printed on the box next to the lot number. A box with no date cannot be aged by the buyer.

How long does fake pee stay warm?

With an included hand warmer secured against the bottle, Upass holds the 90 to 100 degree F range for up to 8 hours. On its own, the bottle cools below range in about an hour.