‘Shark Tank’ founder honors heritage with simple Vietnamese coffee hack — seals $600K deal in a tense pitch

If you love coffee but hate complicated brewing, this ‘Shark Tank’ product will be a game-changer for your morning routine.
PUBLISHED AUG 20, 2025
Entrepreneur Debbie Wei Mullin (L) brings her coffee brand (R) on 'Shark Tank' (Cover Image Source: YouTube | ABC)
Entrepreneur Debbie Wei Mullin (L) brings her coffee brand (R) on 'Shark Tank' (Cover Image Source: YouTube | ABC)

This ‘Shark Tank’ contestant infused culture into her day-to-day life and built a brand around it. Debbie Wei Mullin grew up enjoying Vietnamese cuisine and drinks, despite being the third generation to live in America. It was her grandmother who first arrived in the States in 1975, around the end of the Vietnam War, as per the 'Shark Tank' Blog. Despite calling America their home, the family continued to pay respect to their culture. That’s how Debbie came up with Copper Cow Coffee, a one-step Vietnamese coffee maker. So what’s different about this coffee? It uses no ordinary coffee beans but special, nuttier ones, grown in Vietnam, called Robusta beans. 

A little sweetened condensed milk is added to his coffee to cut the bitterness, making it a perfectly balanced drink. Debbie came up with a genius product that makes it convenient for anyone to brew Vietnamese coffee in minutes. “Our single, individual pour-overs allow anyone to make a gourmet coffee without any additional equipment,” she said on ‘Shark Tank.’ She demonstrated how the process works. One pour-over packet contains a biodegradable filter that has to be used while pouring hot water into the cup. “Immediately watch as your organic coffee drips directly into the cup,” she added. There’s no compromise when it comes to the coffee’s quality as the company has partnered with the best farms of Vietnam.


 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by Copper Cow Coffee (@coppercowcoffee)


 

Once the coffee is brewed, the Copper Cow Creamer containing condensed milk has to be added to give the final touch to the beloved drink. She impressed the investors with her brilliant educational background, from studying at MIT to working in the World Bank. Her company's 70% profit margin was another perk that had the judges invested in hearing more. Nevertheless, it was a risky deal given the high valuation she demanded. Lori Greiner loved the traditional filter she incorporated, but not so much the overall packaging. “The packaging, I don't think, conveys what this is about,” the investor pointed out.

Greiner also felt that coffee wouldn’t fit in her wheelhouse and opted out of the deal. “I love the idea, I think you're smart as can be. Very cool, but I'm out,” she added. The company has been losing money every year and raising investments to cover the expenses. Most of the ‘Sharks’ had issues with this business plan, except Mark Cuban. “You seem to grow in plateaus. You seem to get to a point, something happens, and you raise money,” Robert Herjavec correctly pointed out. When the entrepreneur revealed that the company would lose around $700K in the current financial year, everyone was shocked except Cuban. “That’s not the issue,” he said.


 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by Copper Cow Coffee (@coppercowcoffee)


 

“Why is it always ok, Mark?” Daymond John questioned. “That’s because if you can grow your way out of those losses, you can keep on growing,” Cuban explained. Although Debbie assured that the company would see cash flow profit in the next year, Kevin O’Leary still thought it was a risky move. “This is a very expensive bet that I’m not gonna take. I’m out,” he added. Cuban also opted out of the deal, but Herjavec came as a knight in shining armor, offering $600K for 8%. After going back and forth, Debbie sealed the deal. 

RELATED TOPICS SHARK TANK (2009)

GET THE BIGGEST ENTERTAINMENT STORIES
STRAIGHT TO YOUR INBOX.

MORE STORIES

Created by Stan Lee, Jack Kirby, and Don Heck, the eight-episode series is scheduled to premiere on Tuesday, January 27.
4 hours ago
'Finding Her Edge' Season 1 ends on a cliffhanger, with fans awaiting a second season, and here's everything we know about it.
6 hours ago
Hunter Doohan teases an earlier production start for ‘Wednesday’ Season 3, hinting the Netflix hit could return sooner than expected
6 hours ago
Based on the 1989 show, 'Matlock' follows the sharp and seasoned lawyer Madeline Matlock, who joins a law firm with a secret motive
9 hours ago
Following the midseason finale cliffhanger, 'Tracker' Season 3 is all set to make a comeback on March 1
11 hours ago
At the time of writing, there is no official confirmation on 'Steal' Season 2 from Prime Video
1 day ago
'Fallout' Season 2 Episode 6 completely changes the meaning of ‘bottle caps’ in way we could've never imagined
1 day ago
First-look images from ‘Invincible’ Season 4 tease brutal new villains, familiar heroes, and a March 2026 return that raises the stakes fast.
1 day ago
A shocking mid-episode transformation rewrites 'The Beauty', quietly replacing Rebecca Hall, and changing the series' direction almost instantly
1 day ago
Set to premiere on January 26, 'American Idol' will be hosted by Ryan Seacrest, along with judges Carrie Underwood, Luke Bryan, and Lionel Richie
1 day ago