In honor of National Cat Day, on-demand car service Uber will once again become an on-demand cat service, delivering kittens for 15-minute snuggle sessions.

On Oct. 29, the Uber app will feature a "Kittens!" request button from 11 a.m. to 3 p.m., and for a $30 fee, a car will bring a shelter kitty to your office.

And if you become smitten with a certain kitten, you can even adopt it. Simply ask the shelter representative accompanying your cat delivery for details.

If you're interested in getting a little kitty playtime, it's advisable to make your order early. In past years, Uber has warned that "Demand for kittens will be very high and availability very limited" — and that's certainly been true.

UberKittensMany users who have attempted to request an UberKITTENS delivery have received notifications that read, "Sorry, all kittens are currently being snuggled. Please try again soon!"

While adorable kitten deliveries aren't available in all cities, Uber has expanded its list of participating locations. Find out if you can place a kitten order here.

Before you request those kitties though, Uber advises that you first clear it with your boss and your building — and ensure that none of your co-workers have a cat allergy.

Proceeds from the snuggle sessions will be donated to participating shelters.

This isn't the first time Uber has made headlines for its unusual deliveries. In addition to delivering puppies in the past, the car service has also partnered with condom company L to deliver free condoms, and when Boston school bus drivers went on strike, Uber transported students to public schools.

Editor's note: This story was originally published in 2013, but has been updated.

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Laura Moss writes about a variety of topics with a focus on animals, science, language and culture. But she mostly writes about cats.

Kitten delivery stunt could lead to cat shortage
Uber's on-demand car service will again deliver shelter kittens in honor of National Cat Day — but high demand often creates a snuggle shortage.