Bad news for Jason Kelce: Postal Service rules say you shouldn't mail pee to data centers

USPS says: only some people should send their pee through the mail.

Adam Berry/Redferns Jason Kelce's viral ad pokes fun at data center water usage and tells people to "pee on computers." The ad ends with a chorus of supposed pee-ers handing over yellowish jars to a post office worker.

USPS rules say most people aren't allowed to mail their urine.

Former NFLer Jason Kelce is jokingly telling people to send their urine to data centers over the mail.

USPS rules say most people should just flush.

On Tuesday, Kelce, the co-owner of Garage Beer , starred in a now-viral ad campaign featuring the canned water brand Liquid Death.

After standing next to a toilet, he turns to the camera, revealing a glass jar containing a (concerningly) dark yellowish liquid.

"AI data centers waste millions of gallons of water," he says, before launching into a song with lyrics like, "Let's pee on computers together." The ad ends with a chorus of supposed pee-ers at the "Post Office," complete with an American flag, handing over jars of their "data center coolant" to a postal worker. (Those jars are now available for $18 on Liquid Death's site, with a description that reads, "Mailing your pee to AI data centers has never been easier with these limited edition resealable jars.") "The suits want us to tell you to please don't actually send your pee," small print at the bottom of the ad says.

That's probably good advice.

USPS rules do, in fact, allow some urine to travel through the mail.

Human "excreta" sent for certain routine tests — such as drug or alcohol testing — can qualify as an "exempt human specimen." The mailing service requires those samples to be carefully packaged, including in leakproof containers with absorbent material and rigid outer packaging.

A mason jar of pee destined for a data center is another matter.

The exemption applies to specimens being transported for routine testing, not bodily fluids being mailed as a prank or as an unconventional computer-cooling system.

USPS rules also say nonhazardous liquids must be properly packaged, and that anything producing an "obnoxious odor" is nonmailable.