From eye shadows to lipsticks, here's how four makeup companies create some of their best-selling products inside their factories. ColourPop Cosmetics creates all types of makeup products inside its Los Angeles factory, including its popular Lippie Stix and eyeliners. Sona Gasparian, a beauty blogger and the founder of Persona Cosmetics, takes us inside the factory as she creates Persona's Color Theory Eye Kits. Benefit Cosmetics makes its Precisely My Brow pencils with immense attention to detail inside its Tokyo factory. Cosmetic scientists from Rimmel London test the matte formula for the Stay Matte Liquid Lip Colour products to make sure they are pigmented and long-lasting.