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.

Safe and natural cleaning products; a party cup with a hidden shot glass; a lightweight, electric bodyboard; a root cover for recently planted trees.

Popular knee-high boot socks sold online; a stylish clutch for essential items; a way for kids to create and personalize lunchbox designs; customized chocolate bars; artisan cheese and glazed donut sandwiches.

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.

An entrepreneur from New York City presents an innovative line of flatware, cups and plates that makes eating more hands-free and carefree; the only airtight, self-sealing zip-top bag in the world made entirely of pure silicone with all the benefits of glass is introduced by an entrepreneur from California; an Arlington, Virginia, entrepreneur hopes to take nap time to a whole new level; an entrepreneur from Pennsylvania is hoping to sell the Sharks on his non-toxic, super hydrophobic spray that repels stains.

Seafood breading mix; a pet communication invention; a re-engineered bathrobe; men's long hair needs; an update on Brightwheel, a software solution for early education.

Entrepreneurs from Amarillo, Texas, introduce their new, fun and exciting way to decorate Easter eggs without all the mess; entrepreneurs from Los Angeles, California, pitch their glue-less, self-clinging, reusable tape invention; an entrepreneur from West Covina, California, shares his line of transportation devices to help people get around efficiently and save money; an entrepreneur from New York City presents his digital tool to turn loose change into effortless money.