2A fizzy mixture of Mentos mints and Diet Coke, internationally famous in an Internet video, continues to bubble.

The Buckfield-based duo who created the famous video will pick up two Webby awards in a posh June 4 ceremony in Manhattan.

Fritz Grobe and Stephen Voltz plan to perform their soda fountain routine at the event before accepting awards for best “viral” video and a people’s choice award.

The viral video category is a first for the awards, known as the Internet Oscars. Viral videos are defined as those that gain an audience by passing from person to person.

The new winners have questions.

They are still trying to find out how formal the event will be, searching the Internet to see whether they’ll need to wear tuxedos.

“We don’t know,” said Voltz, a former attorney. “Fritz will have to buy a suit and I’ll dig out the suits I used to wear to court.”

They also need to decide on their acceptance speeches. Winners for each award are limited to only five words.

They still haven’t decided which words they’ll say, but they plan to attend both nights of the awards, including a ceremony that is slated to feature David Bowie and the founders of YouTube, Steve Chen and Chad Hurley.

“We’re going to go, ‘Oh, my God. Look where we are,'” Voltz said.

It’s something they’ve been saying a lot since they first posted the video on their Web site, www.EepyBird.com, last June.

The video showed Grobe and Voltz in lab coats setting off geysers of soda. The choreographed streams resembled the fountains outside Las Vegas’ Bellagio.

“There’s a little comedy in it,” Voltz said. “There’s a little science in it. There’s a little dance in it.”

Music by their friend, Matthew Tardy, helped “kick it up a notch,” Voltz said.

The combination seemed to work at a moment when videos – rather than jokes or photos – were first being passed along the Internet.

Within days, they were called by producers for “The Late Show with David Letterman.” Within weeks they’d performed on the “Today” show.

In the months that followed, they were invited to perform with the Blue Man Group. They were featured in a new video by the Barenaked Ladies. And after the sale of Mentos took a leap, the company hired them to perform at a factory in Holland. There were also company dates in Paris and Istanbul.

Voltz and Grobe now hope to be included in the Guinness Book of World Records. On May, 24, they plan to gather 500 volunteers to set off 500 geysers in Cincinnati’s Fountain Square.

Why there?

It’s the nearest big city to Mentos’ U.S. headquarters in Erlanger, Ky.

The nod from the Webby folks, the International Academy of Digital Arts and Sciences, seems like icing.

Their challenge now is topping themselves.

“We caught lighting in a bottle with that first video,” Voltz said. “We don’t know if we will do something that successful again. We’re certainly going to give it a shot.”

They are even working on a new routine, though it’s still a secret. Voltz declined to say when it might be ready for worldwide release.

“We’re still in the lab on that,” he said.