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44 Failed Shark Tank Ideas That Had The Sharks Regretting Everything
Home & DesignMAY 19, 2025

44 Failed Shark Tank Ideas That Had The Sharks Regretting Everything

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Scrub Daddy, Squatty Potty, and Bombas are all examples of products that knocked it out of the park on Shark Tank. After the famous business reality television show, the creators of these unique brands went on to make millions in sales. 
However, there were also a lot of products that didn’t have as much potential and were ruthlessly criticized by sharks, some of which we’re featuring today. While their ideas didn’t succeed, these aspiring entrepreneurs can definitely teach us a lesson or two. 
Scroll down to find some of the worst products featured on Shark Tank, and don’t forget to upvote those you might want to see in stores despite their failure on the show.
While you're at it, don't forget to check out a conversation with April Shprintz, business accelerator, leading sales expert, and founder of Driven Outcomes, who kindly agreed to share her insights on how entrepreneurs can turn failure into something beneficial.

#1 Original Man Candle (2011)

Original Man Candle (2011)
An entrepreneur appeared on Shark Tank to pitch The Original Man Candle, proposing scented candles marketed towards men with unique fragrances like popcorn and flatulence. The idea was to differentiate them from traditional, more feminine options. However, the unusual scent choices or perhaps issues with the business plan resulted in none of the investors offering funding. 
38points

#2 Ionic Ear

Ionic Ear
In the very first episode of Shark Tank, an inventor pitched the Ionic Ear, an implantable Bluetooth headset requiring surgery to place inside the ear. The device also needed nightly charging by inserting a needle. Investors were visibly shocked by this concept, immediately raising serious safety concerns about implanting and charging such a device. Consequently, the unusual and seemingly dangerous idea led all the sharks to decline offering any investment.
34points

#3 Pavlock

Pavlock
PavLock, featured in season 7, was a wearable device designed to administer small electric shocks to help users break bad habits. The entrepreneur faced strong criticism from investors who questioned the scientific data presented and the product's actual effectiveness. While one shark, Kevin O'Leary, did make an offer, the entrepreneur rejected him specifically, seeking a deal from someone else. This refusal resulted in all potential investors backing out, leaving the entrepreneur without funding.
29points

Many Pandas are probably familiar with how Shark Tank works, but just in case, let’s briefly run it by again to refresh our memory.

The show starts out with entrepreneurs bringing their ideas to the sharks (successful business owners) and asking for an investment in return for a share of their company. Then, the investors listen to their pitch, analyze the potential, and decide whether they want to give them the money.

#4 Squirrel Boss (2013)

Squirrel Boss (2013)
During a season 4 episode, a product called Squirrel Boss was presented, intended as a bird feeder that used an electric shock to deter squirrels. The significant issue was that the device failed to differentiate between pests and birds, shocking any animal that touched it. Coupled with its high price tag and lack of patent, these flaws made the investors unwilling to back it. The product saw limited life afterward and ultimately did not succeed due to its fundamental problems.
27points

#5 Toygaroo (2011)

Toygaroo (2011)
ToyGaroo, featured in season 2, was a subscription service offering monthly rentals of children's toys to parents. The concept successfully attracted a $250,000 investment from Mark Cuban and Kevin O'Leary. However, the company struggled immensely with the surge in demand following its television appearance. The high costs associated with obtaining quality toys and shipping them quickly led the business to go bankrupt, marking it as a significant failure from the show.
26points

#6 Licki Brush

Licki Brush
Featured in season 8, the Licki Brush was presented as a device allowing cat owners to groom their pets by mimicking a cat's licking motion. The product was a tongue-shaped brush intended to be worn in the owner's mouth. The founder explained it as a way to engage in a cat's natural bonding ritual. The unusual nature of the demonstration and the concept itself led the investors to decline offering a deal.
26points

For example, in season 10, on average, an investment deal offered 23% of the company in exchange for $286k. While this show was created for entertainment, some product owners were able to gain money and publicity and launch their business to success. Unfortunately, it also featured some flops that made the viewers cringe, but it definitely taught the entrepreneurs some valuable lessons.

#7 Morninghead

Morninghead
Morninghead was introduced as a quick method to address bedhead by merely wetting the hair. However, the investors viewed the product, essentially a water-filled head covering, as overly simplistic and not genuinely effective. The concept largely elicited laughter from the panel. Ultimately, the entrepreneur departed without a deal, as the product was deemed unpromising.
26points

#8 NoPhone

NoPhone
In season 7, entrepreneurs presented the NoPhone, a product intended to combat phone addiction by offering a fake, non-functional alternative device. They highlighted the widespread issue of constant phone use during their pitch. The NoPhone is simply a plastic object shaped like a phone, designed for individuals who feel the need to hold something in their hands. The idea stemmed from their observation of people's reliance on their devices.
25points

#9 Sticky Note

Sticky Note
An inventor appeared in the first season seeking $100,000 for a product named Sticky Note, a pad meant to attach to computers for holding sticky notes. Investors quickly questioned the high valuation and lack of sales, seeing the item as overly simple and priced too high at nearly $10. Most sharks considered it a useless invention. Ultimately, despite one investor acknowledging some potential, the product did not secure a deal.
24points

These lessons can be very beneficial and should be used to improve their business. That's why it's so important not to give up after facing a failure.

"Giving up as an entrepreneur after experiencing failure would be like a baby giving up on walking after they fall down the first time," says April Shprintz, business accelerator, leading sales expert, and founder of Driven Outcomes.

"Failure is part of the process of learning, and the value of going through it is often underestimated. As an investor, when I'm going to put my money into a company, I first check that the entrepreneur has already had a failure or two because it's not if they'll ever fail, it's when, and have they learned from it."

#10 Fish Frenz

Fish Frenz
On Shark Tank Australia, an inventor presented Fish Frenz, a container designed to release bait while floating, intended to give fishers an advantage. However, his pitch prominently featured a poorly received marketing angle suggesting the product was particularly beneficial for women, leading to pointed questions from the investors. Compounding this, the entrepreneur admitted he had not sold any units of the product. Ultimately, the combination of the awkward marketing and lack of sales resulted in him leaving the show without a deal.
24points

#11 Copy Keyboard

Copy Keyboard
An entrepreneur pitched the Copy Keyboard, a two-button USB gadget designed to make copying and pasting on a computer easier. He sought investment to lower production costs and scale the business, claiming growing demand for the simple device. However, the investors found the product lacking and ultimately all declined to offer any funding.
24points

#12 Cate App (2012)

Cate App (2012)
In 2012, an app designed to conceal phone messages from specific contacts received a $70,000 investment on Shark Tank. Although it saw initial user interest after airing, the application was plagued by significant technical problems and security vulnerabilities. These issues, combined with better alternatives appearing, led to the app's downfall and withdrawal from the market. Consequently, the investment was lost, classifying it among the show's least successful deals.
23points

Becoming a business owner and getting your product out there isn’t as easy as it might first seem. It’s enough to make just one little mistake, and your product fails to reach a wider audience.

"Many businesses run out of funding before they start generating meaningful revenue. Others are started by folks who don't really know much about the business or industry they start in and aren't able to learn quickly enough to become successful," Shprintz says, explaining why so many startups and young businesses fail.

"Lastly, many people 'want to start a business' the way they 'want to get married' or 'want to have a baby' their desire is centered more around the beginning or the event, not the day-to-day realities of living the life of an entrepreneur."

#13 Throx Socks

Throx Socks
Throx Socks was a product designed to address the common issue of losing single socks. His innovative solution involves selling socks in packs of three, providing a spare in case one is lost. The pitch sought investment to expand the business and offer their colorful, uniquely sized sock packs to a wider audience.
22points

#14 Minuscal Health Bars

Minuscal Health Bars
Founders presented Minus Cal on Shark Tank, promoting health bars and tablets with a special extract claimed to help users lose weight by blocking calorie absorption. However, investors were highly doubtful of these strong claims, especially when pressed for scientific evidence. The pitch became contentious as the entrepreneurs made conflicting statements about the product's purpose and argued with the sharks. Consequently, the product received no investment, marked by significant friction during the presentation.
22points

#15 Carsik Bib

Carsik Bib
During Season 2, Les Cookson pitched the Carsik Bib, a product designed to manage vomiting caused by motion sickness. His detailed demonstration, which included using fake vomit, elicited reactions of discomfort and amusement from the investors. Despite the memorable pitch, none of the sharks offered funding for the product. The company ultimately ceased operations, though the inventor later returned with a different idea that did secure a deal.
22points

In Shark Tank’s case, the entrepreneurs often failed to convince the sharks because they lacked a fully developed business plan or didn’t research the market and the target audience enough. Some other mistakes they made were not identifying the target audience, not assessing the competition, not coming up with an expansion strategy, and not testing the viability of their product.

Even those that succeeded and got an investment couldn’t keep their business afloat. Like, for example, ToyGaroo, aka “The Netflix for toys”—a subscription service that allowed parents to rent different toys every month.

#16 Nootrobox

Nootrobox
Entrepreneurs proposed Nootrobox, offering caffeine-infused cubes and supplements intended to boost cognitive function. They sought a large investment for their company based on a significantly high valuation. However, investors questioned the scientific basis of their claims, the high valuation, and the business strategy, feeling it focused too much on science over sales.
22points

#17 Trunkster (2015)

Trunkster (2015)
Trunkster was presented on Shark Tank as innovative smart luggage featuring technology like GPS and USB ports. The concept secured a substantial $1.4 million investment from Mark Cuban and Lori Greiner in season 7. However, the deal ultimately failed due to inflated valuation based on presales and projections. Many customers who pre-ordered the product either didn't receive it or got items that were poor quality, leading to the company's downfall.
21points

#18 Wired Waffles (2012)

Wired Waffles (2012)
Presented in season 4, Wired Waffles were marketed as caffeine-infused waffles intended to save time by combining breakfast and coffee. Despite the concept, investors found the product unappealing and risky. Concerns included the inability to patent caffeine, reports of poor taste, and the significant danger of accidental ingestion by children. Ultimately, the idea did not secure any funding on the show, seen as a product that wasn't fully thought through or properly tested.
21points

However, there are ways to recover from failure and come out the other side.

"Recovering after a major setback or failure in business is all about mindset. Entrepreneurs should ask themselves, 'How is this happening FOR me instead of TO me?" and "What can I apply from this to what I do next in order to succeed?'" says Shprintz.

"On a more tactical level, I always advise my clients to ask themselves how they can best serve their clients from where they are now. Usually, in looking to provide clients value, they'll find hidden answers to questions they may not have thought to even ask yet."

#19 Skinny Mirror

Skinny Mirror
During season 7, an entrepreneur pitched The Skinny Mirror, which was designed to make people look thinner and boost self-esteem. Seeking $200,000, the product used unpatented glass to create this effect. However, the investors were highly critical, questioning the business validity and calling it easily replicable. The pitch met significant pushback, resulting in no investment for the product.
21points

#20 His And Hers

His And Hers
In Season 12, a couple presented "His and Hers," snack bars marketed as aphrodisiacs for couples, seeking a $50,000 investment. The pitch included a jingle and emotional stories from the founders. However, investors quickly learned the business had generated very low sales. Seeing limited potential and finding the pitch overly reliant on personal anecdotes, the sharks ultimately chose not to invest.
21points
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