Updated: 2023 Jun 1.

Effective Methods for Keeping Your Pee Warm and Passing Your Drug Test with Confidence

Harry Olson, Edwin Manion and Dale Porter
PMID: 6433016436 DOI: 10.1s6430072643

You’ve landed the job interview of your dreams. But there’s one problem: the company requires a drug test before hiring.

You’re confident that you’ll pass, except for one thing: you plan to use synthetic urine.

Fake pee can be an effective way to pass a drug test, but only if it is the right temperature.

The wrong temperature is the number one reason people fail a drug test using fake pee.

Don’t let your dream job slip away because of a simple mistake.

Keep reading to learn how to keep urine warm for a drug test and pass with flying colors.

We’ve got you covered with the best options to warm up synthetic urine and keep it warm before the drug test, so you can take the test with confidence and without any problems.

What’s the Right Temperature for Urine in a Drug Test?

If you’re scheduled for a drug test at LabCorp or any other lab, the urine temperature must be within a specific range for an accurate result.

The urine temperature must be between 97-100 Fahrenheit degrees.

In addition, the sample must be submitted within 2-4 minutes after peeing.

Keep in mind that urine will cool down during that 4 minutes.

A 90-100 Fahrenheit temperature is acceptable, but collectors know that urine will not cool down to 90–92 Fahrenheit degrees that fast.

Therefore, the best option is to submit it within 96-98 Fahrenheit degrees.

Here’s What Happens When Your Urine’s Not Warm Enough

If the urine is not warm enough for the drug test, the collector will require you to provide a second specimen as soon as possible under direct observation.

Direct observation means that the collector will watch you pee. Refusing to provide a second specimen will be reported as the result.

The result will be reported to the medical review officer and your employer.

Most, if not all employers treat a refusal as worse than a positive, and consider it an ‘insta-fire’ offense.

Also, collectors consider a below-body temperature as cheating, and they will require you to provide another sample.

The Most Effective Ways to Keep Your Urine Warm for a Drug Test

The most reliable and convenient way to warm urine for a drug test is to use heat activator powder. This powder heats up urine within seconds and allows great control over the temperature. Such powder usually comes with high-quality synthetic urine kits.

However, if you don’t have access to heat activator powder, there are other methods to keep your urine warm. First, you’ll need a container for the urine.

It can be a pill bottle or a condom, but we recommend using special urine bottles with temperature strips. Such bottles allow convenient temperature control without using additional thermometers.

temperature strip on a bottle

Once you’ve put your clean urine in the container, here are three options to keep it warm:

How to Keep Urine Warm Without Hand Warmers

Between Your Legs

  • Put the bottle in your pants right between your legs in the crotch.
  • It’s better to use tight pants so the bottle will be closer to your body.
  • The urine will stay warm in the crotch as long as you keep it close to your body.
  • Make sure you wear a dress or loose pants, so no one can notice the bottle in your pants.
  • If you don’t use a bottle with a temperature strip, hide a digital thermometer in your clothes.

The urine will stay warm between your legs as long as you keep it close to the body in the pants.

In a Bra

This method is almost the same as the previous one.

  • You need to place the bottle in your bra, close to your body.
  • The method is worse because the bottle in a bra is more noticeable.
  • You also have to fix the bottle with adhesive tape because you don’t want it to fall out.

With Hand Warmers

Hand warmers are the most popular way to keep synthetic urine warm. Hand warmers fail in rare cases, so you need to have two as a backup solution.

  • You need to activate the hand warmer according to the instructions.
  • Then, tuck it securely into your underwear both to keep it warm and to hide it.
  • You can use a stash leg belt or special underwear for convenience.
  • On arrival, just before you go in, make sure you check the temperature. If it has cooled (because the heat pad has been unreliable), use the second heat pad to restore the temperature.
  • If your urine was cold, it will take about 1 hour to raise the temperature of the urine with a hand warmer.

handwarmer attached to urine bottle

Low quality handwarmers can make the urine too hot. So you should test handwarmers before using them for drug test.

Heat Activator Powder

Heat activator powder is the easiest way to warm up synthetic urine for a drug test. You need to use it before submitting your sample.

heat activation powder

Carefully add 1/3 of the heat activator into the mixing container.

If the temperature on the strip indicates a solution temperature of 88°F to 92°F then we recommend that you only add 1/4 of the heat activator into the mixing.

Gently shake the contents to completely dissolve the heat activator, which usually takes less than 20 seconds.

After the heat activator granules have completely dissolved, read the temperature strip to ensure that the solution is within the required temperature range of 94°F to 100°F (indicated in green).

How to Warm up Urine from the Fridge

If you’re using refrigerated urine or the urine sample is at room temperature, it can take more than 1 hour to warm it to body temperature with hand warmers or body heat.

So it’s better to preheat it using a microwave. Microwave the sample for about 10 seconds on full power.

Shake it gently, and watch the temperature strip. If there is no reading, do it again for another 10 seconds.

You want to get a reading on the temperature strip that is as close to 100°F as possible, but without going over (otherwise, there won’t be a reading showing again, and you will have a dramatically overheated sample).

If the urine is too hot, just let it cool down for a few minutes. Use a thermometer or temperature strip to control the temperature.

How to Heat up Synthetic Urine without a Microwave

If you don’t have a microwave available, there are other ways to heat up synthetic urine.

You can heat it in a water bath on a stove, in hot water, using a heating pad, or by putting it close to the body. However, the last method will require at least 1 hour to heat it to body temperature.

Check the Temperature

On arrival, just before you go in, make sure you check the temperature.

If it has cooled down (because the heat pad has been unreliable), use the second heat pad to restore the temperature.

It’s crucial to keep the urine within the required temperature range to ensure that you pass the drug test.

Remember, cheating on a drug test is illegal, and synthetic urine is meant to be used for legitimate purposes only.

Follow these tips carefully to keep your synthetic urine warm and stay out of trouble.

How to Check the Temperature of the Urine

If you want to pass a drug test using synthetic urine, you need to ensure it’s at the right temperature. Here’s how you can check it:

You can use a waterproof digital thermometer to check the temperature of the urine. But it’s not always convenient to use, especially if you’re doing the test in public.

It’s better to use temperature strips instead. These strips are easy to use, and they’re more convenient. You can attach them to the bottle, and they’ll give you an accurate reading.

When using temperature strips, you need to check that the maximum temperature allowed is over 90 F. Many strips have a maximum temperature of 90 F, so you need to be careful.

temperature strip with temperature reading

The best synthetic urine kits have a temperature strip attached to the bottle.

This makes it easy for you to check the temperature, and you don’t have to worry about buying separate strips.

A Few Words About Using Someone Else’s Urine

Using someone else’s urine for a drug test is a bad idea. Here’s why:

You never know what drugs the person actually used. They may think they’re clean, even if they smoked cannabis a couple of weeks ago. Cannabis metabolites can stay in your body for a long time.

Human urine spoils fast. Even if you keep it in a fridge, it will be detected on a drug test. If urine spoils, it will change color, and the collector will see it. They will request a drug test under direct observation.

You need to submit urine at the right temperature, so you still need the heating pad. You can use a bottle of water, but that’s risky.

The cheap shortcut of trying to get someone else’s urine to submit is not worth it.

Use high-quality synthetic urine instead. The risk is not worth it.

Best Synthetic Urine Kits with the Most Convenient Way to Keep Your Urine Warm

Sub Solution: The Best Overall Synthetic Urine Kit

Sub Solution is the bestselling synthetic urine kit for a reason.

It contains at least 11 chemicals found in human urine, making it virtually identical to the real thing. Plus, it includes a heat activator powder to heat the urine to body temperature within seconds.

The temperature strip attached to the bottle makes it easy to maintain the urine’s temperature, and the kit is undetectable and toxin-free.

At just $90, it’s the best balance between price and product features.

The only downside? You’ll need a place to hide the urine bottle, but you can easily tuck it in your underwear.

Get Sub Solution

Incognito Belt: Best for Supervised Drug Tests

incognito belt on a female waist

The Incognito Belt is a premixed synthetic urine kit that comes with everything you need to pass a supervised drug test.

It includes enough high-quality synthetic urine for two uses, two heat pads to maintain the temperature, and a velcro adjustable discreet belt to hide the urine on your waist.

The rubber tube and convenient clip allow you to discreetly deliver the urine even while being supervised.

The detailed instructions make it easy to use, and at $130, it’s a bit pricier than Sub Solution but still worth the investment.

Get Incognito Belt

The Urinator: An Electric Warmer Belt with a High Price Tag


Finally, there’s The Urinator. While this synthetic urine kit is reputable and reliable, the $190 price tag is quite steep.

It comes with a computerized digital controller that maintains the correct temperature and is sealed to prevent electrical shorting, but we don’t see the reason to pay so much when there are other great options on the market.

Accessories That Will Help To Keep Urine Warm

Stash Leg Belt

stash leg belt on female leg

If you’re looking for a device that will help you keep your synthetic urine warm for longer, the Stash Leg Belt is a great option.

Here are some of its key features:

  • Fits most standard size synthetic urine bottles
  • Made of high-quality Neoprene material for a comfortable and flexible fit for most thigh sizes
  • Helps to keep your bottle warm longer, making it perfect for long periods of wear
  • Conceals your valuables

At just $30, the Stash Leg Belt is a cost-effective way to keep your synthetic urine warm for a drug test.

Get Stash Leg Belt

Stash Boxers

For a more comfortable option, the Stash Boxers are designed with a dedicated front, inside pocket with ample space, and quick easy access with no button or zipper hassle.

Here are some of its key features:

  • As comfortable as your own underwear
  • Undetectable and stealthy
  • Ample space to hold your synthetic urine bottle

At just $35, the Stash Boxers are a great option for those who want a more comfortable and stealthy way to keep their synthetic urine warm.

Get Stash Boxers


While there are several options available to keep your synthetic urine warm, the most reliable method is heat activator powder.

We recommend using the Sub Solution kit, which already includes the powder.

It is the best synthetic urine kit on the market today, containing at least 11 chemicals found in human urine, and is undetectable, reliable, and effective.

For a more discreet option, we suggest using the Incognito Belt with heat pads. Whatever your choice, these devices will help you pass your drug test with flying colors!

Articles provided here courtesy of MSI-COPS