Avoid jelly/flexible and cheap toys. More often than not they're made out of a material that is unsafe for the body and they are porous, making them much harder to clean and sanitize. Look for silicone, hard plastic and glass, they don't have toxins and are much easier to clean, therefore much more hygienic. Save your money for a good, expensive toy that will last a long time and *do not buy something that is advertised as 'novelty. They are very bad!