Tempers flare and insults fly when the Sharks fight over an innovative three-in-one nail polish invented by a mother of six girls from West Hartford, CT, who had to sell her engagement ring to start her business. A husband and wife team of feisty New Yorkers believe they have the next big thing in women's accessories; two Pittsburgh hockey moms pitch their home-grown tank top business with interchangeable straps; and a couple from Pasadena, CA insist that their unique sippy cups be manufactured in the USA to maintain quality. In a follow up story, the entrepreneurs behind Talbott Teas from Chicago, IL have big news about a deal with Jamba Juice after their TV appearance.

Billy Blanks Jr. asks the sharks to invest in a dance fitness program; a music producer seeks an investment in a rock band; two college students pitch their flavored peanut butter business.

The sharks fight for a chance to go into business with an inventor; two fitness trainers pitch their idea for a unique home gym; a young man seeks an investment in his age-defying products.

A line of dresses made of pillowcases; a unique spatula; vitamin oral sprays; energy-boosting waffles.

Barbara and Kevin take part in a demonstration for an innovative way to tie the knot, and a Pittsburgh native gives an update on her prospering business of sugar scrubs. Also: Two young women pitch toys designed to empower the next generation of female engineers and innovators, a family man tries to sell his design for a porcelain coffee mug that is both elegant and functional, and a finer, more precise golf putter is presented to the Sharks.

Stuffed animals that also serve as washcloths; a handmade wearable sling to carry dogs; a darts-like card game.

The Sharks consider a business idea for affordable wedding cakes brought to them by a mother and son from Grand Rapids, Mich. Also: a Houston restaurateur with a solution to a common problem encountered while dining out, and an update on a screen repair fix-it kit that Lori invested in during Season 5.

Entrepreneurs include the owner of an all-female golf caddy company, a couple who believe they have come up with a better, safer way for kids to bounce, and a trio who pitch to the Sharks their fun spin on a classic faceware accessory. Also: an update on Mark Cuban's $2 million investment in the Los Angeles Haunted Hayride during Season 4.

An olive oil bar where one can sample oils before purchasing; unique wedding registry idea; a product that can turn a smartphone into a personal security device; boxed wine geared toward millenials; a follow-up on Breathometer.

The Sharks hear a pitch for hypergravity-exercise clothing, as well as a line of products that appeal to fans of facial hair, and a karaoke machine that adds jaw-dropping vocal harmonies to help users sound like their favorite singing stars. Also: belts that are easy for kids to use, and a follow-up on Barbara's Season 5 investment in a company specializing in hand-knitted socks and leg warmers.

Entrepreneurs with military backgrounds present ideas that include nonslip protective gloves for cross-fitness training, an elite canine training program and a bottle opener made of recycled.50 caliber shells.

A dating app that introduces singles to friends of friends; a new way to eat a bagel.

A vest with a twist that was inspired by a girl's science project; baking healthy, homemade cookies; a cleaning solution for water bottles; re-usable fabric stickers.

An elegant lighting solution; wearable sleep technology; a food bar for dogs; actor Dean Cain and MMA fighter Uriah Faber help pitch custom-tailored suits.

Almond water beverage line; eco-friendly pizza box; real estate investing business; cell phone sanitization solution; update on photo-saving product, Groovebook.

A device to eliminate clogged sinks, real grass delivery service for pets, and a climate-controlled bed.

A mom from Atlanta, GA has the solution to the lost pacifier problem; a beekeeper from Portland, OR wants the Sharks to invest in his hives; a Palm Beach, FL entrepreneur sells customized stuffed animals; two men from Chicago, IL and Indianapolis, IN tout their super-comfortable lightweight running shoes. In addition, Barbara Corcoran follows up with this season's 13-year-old Andrea Hirzel Cao and her mom, Hong Cao, creators of Q Flex.

A sustainable soil replacement for peat moss; sweet-flavored wipes for cleaning kids' faces.

Pat Boone and a man from Vermont present a new eco-friendly car that runs on compressed air.

A very life-like, synthetic human for medical testing; personalized super hero action figures; an affordable online service to help you quickly achieve a high-end interior room design; a sunscreen full-body misting device; Also, an update on the Squatty Potty, that Barbara Corcoran invested in during Season 6.

Nick Woodman; a cafe where the patrons enjoy the company of rescue cats; electric compact vehicle.

Cookie legend Wally Amos hopes his new brand of cookies duplicates his past success; two sisters share an emotional story while pitching their swimsuits for moms; two men drop their own cell phone into a toilet to prove their invention can save damaged tech devices; and a bidding war ensues among the Sharks with a married couple who stumbled upon the bright idea of putting safety light clips on running shoes.

Two sister kidpreneurs might just dance their way into the Sharks' hearts with their body sprays and lotions designed just for tween and teen girls; a 3rd-generation chocolatier hopes the Sharks will bite into a family business that manufactures candy with a toy inside; the Sharks encourage a veteran food entrepreneur to make counter offers for his device that instantly turns a stick of butter into a spray; two experienced entrepreneurs have the Sharks swooning over their ingenious invention that makes high heels more functional and comfortable. Also, an update on Natural Grip, the non-slip protective glove for workouts that Robert Herjavec invested in during season 6.

A stay-at-home mom pitches her stylish clothing line for little ones; an 18-year-old hopes the Sharks can help spread his delicious maple syrup products to tables across America; a woman has risked everything for her simple and smart multi-use kitchen accessory; and a young man created a new type of tag for dog lovers. Also, a profile on Kevin O'Leary reveals a lesser-known side of the Shark also known as "Mr. Wonderful."

A woman from West Haven, Utah, had to sell off 75% of her faux flower business in order to keep it alive; two men from Sausalito, California, pitch a way to test mercury levels in a single fish; a former corporate executive from Houston, Texas, has a platform to help people pursue their passions; and a millennial from Pittsburgh, Pennsylvania, is looking to finance her fashion brand geared toward the social media generation. Also, an update on Wicked Good Cupcakes, which Kevin O'Leary invested in during season 4.