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Mark Cuban checks in on a beauty product investment he made during season 4; Daymond John doesn't see eye-to-eye with an investment partner and wonders if they will continue their business partnership; a pet product inventor tries to get his invention into the marketplace without a Shark's guidance; and a man who nearly bankrupted his luggage business invests Shark Lori Greiner's money in a product he knows does not meet with her approval.

Lori Greiner checks on her investment of The Paintbrush Cover, a convenient way to store wet paintbrushes from Season Five, and throws a curveball into attempts to take their business to the next level. Robert Herjavec meets with Mark and Hanna Lim, the couple who invented the Lollacup to understand why their sales have stalled and how they can be re-ignited. And despite not getting an investment from the sharks, entrepreneur Liz Holtz still finds success with her gluten-free cookies.

Barbara Corcoran wants to hold off on expanding a food truck concept into brick-and-mortar space; Daymond John continues to mentor the inventor of a self-tie bowtie; husband and wife creators of a beer bottle opener encounter a bottleneck in production and before moving forward, Kevin O'Leary has advice on how their business can be more efficient.

Find out how Sharks Lori Geiner, Mark Cuban, Kein O' Leary, and Robert Herjavec did with their Shark Tank entrepreneurs Squatty Potty, Tower Paddle Boards, Wicked Good Cupcakes and Grill Charms.

Mark Cuban goes one-on-one with the Austin, Texas team from Beatbox, a boxed wine geared towards millennials. Beatbox creators got a deal during Season Six, and know they have to convince Mark that they can find innovative and creative ways to bring in new customers.

Robert Herjavec and Louisville, Kentucky-based Pat Yates meet with executives from DreamWorks to try and land a major licensing deal for their product Happy Feet. New Orleans-based Treasure Chest Pets, a plush toy with secret compartments for kids to store valuables, doesn't anticipate how the recession would impact its business. Scratch and Grain baking kits has problems with how production is being handled.

Daymond John is convinced a pet meal manufacturer needs a licensing partner; makers of a car sleeve are overwhelmed but need to move to the next level in sales; and Kevin O'Leary checks in on the creators of custom sorority dresses.

Entrepreneurs Dennis Iannotti and Peter Ferriera want to expand their brand of peanut butter into mass-market retail and hope the Sharks can advise them on how best to grow their business; Lori suggests how an entrepreneur might tone down his excitement before a QVC appearance; the inventor of single-serve wine cups must find a co-packer who can produce a high volume of wine.

Shark Robert Herjavec has some harsh truths for a Huntington Beach skateboard company; an energy supplement company by and for the military community undergoes changes.

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A California entrepreneur searches for the right winery to partner with for her Bon Affair wine spritzers; Daymond John delivers some tough love about expanding Mission Belt, a belt with no holes; Tiggs Chirigua was heartbroken when he didn't get a deal for the his elegant and functional porcelain coffee mug, and is taken aback when Lori Greiner makes an offer to invest in his company.

Lori Greiner and Robert Herjavec are concerned a plush toy maker is diluting his brand; the makers of Mango Mango Preserves get unexpected help from their hometown of Hampton, Virginia; the inventors of Aqua Vault, a portable safe to secure valuables while in recreational areas, are feeling the financial downside of entrepreneurship and hope Daymond John will float them so a deal with a major waterpark can be made.

The Sharks question the $50 million value of the Breathometer mobile app; a sock business with a social mission is doing great online, but its managers wonder if their limited skills and competition will hinder its growth; Barbara Corcoran shares why the strategy of a seasonal decorating kit business is not a good one.

An online honeymoon crowdfunding site wants to make a risky business model change, and Kevin O'Leary hopes to avert disaster. Lori Greiner stops by the new showroom of Cordaroy's, beanbag chairs that convert into a bed. Barbara Corcoran's very first deal in the Tank helped grow Pork Barrel BBQ spice rub into a national brand, and its two creators have since created a new product that could be a hit.