Mar 1, 2023 · What are Phthalates? Pronounced “THAL-ates,” phthalates make plastic soft and flexible, and are often found in car interiors, shower curtains, deodorant, cosmetics, and medical devices. Phthalates can also be found in children’s products such as toys, rattles, teethers, rubber ducks, bath books, baby shampoo, soap and lotion.