Plot: A young man and his business partner from Carrollton, Texas, pitch an unusual twist to a common vegetable; two sisters from Philadelphia, Pennsylvania, get a Shark to proclaim that their barbeque sauce "could bring a tear to a glass eye;" two millennial entrepreneurs have a way to alleviate the hassle of luggage and packing; and a biochemist from Chapel Hill, North Carolina, can make the invisible visible with a device that ensures sun protection. Also, an update on the Grace & Lace accessory line, which Barbara Corcoran invested in during season 5