TPE sex dolls were once considered disposable like inflatable toys, but today they have come a long way in terms of durability, quality and appearance. If properly cared for, platinum-cured silicone dolls can last ten years, while TPE sex dolls have a lifespan of less than three years. Both types of sex dolls are very popular among today’s generation. Silicone dolls may be more expensive than TPE dolls due to their quality and durability.