Lori Greiner checks in on her investment of The Paintbrush Cover, a convenient way to store wet paintbrushes from Season Five. She throws a curveball into their attempts to take their business to the next level. Robert Herjavec meets with the couple who invented the Lollacup - an innovative sippy cup from Season Three - to understand why their sales have stalled and how they can be re-ignited. Despite not getting an investment from the Sharks in Season Four, a brand of gluten-free cookies still finds success.