While dildo materials are also a personal preference, each has advantages and disadvantages. The three most common are silicone, stainless steel, and plastic. Silicone has a lifelike feel with comfortable flexibility and the potential to hold various shapes and sizes. But it’s less durable than stainless steel and degrades if you use it with oil-based lubricants. Stainless steel is incredibly durable, compatible with any lube, and easy to clean, but it’s cold to the touch and lacks flexibility. We generally don’t recommend basic plastic dildoes.