This plastic compound is similar to rubber in the sense that it is extremely flexible; though silicone is a superior material for reasons of general quality and impeccable hygiene. Silicone is a material of the highest quality; it is 100% medical-grade, 100% non-porous, phthalate-free, latex free, hypo-allergenic, odorless, tasteless, and serializable.
Most glass sex toy products are made from borosilicate glass. The material is unyielding, non-porous, and can be sterilized. Glass retains temperature and is perfect for those who like to experiment with cold or warm sensations.
When used in the context of sex toys, "plastic" usually means hard plastic. Some of the positive aspects of hard plastic: It is phthalate-free, has a very low porosity level, is easy to clean, comes in a variety of different colors, is extremely rigid, very inexpensive, and it carries vibration well.
TPR is lightweight, fairly affordable, and very pliable, but tends to have a subtle odor and flavor. It resembles jelly in texture but doesn't contain phthalates or latex. TPR is very porous so use a condom when sharing.
PVC is a soft, rubbery material frequently made using a combination of PVC or polyurethane and a number of other chemicals; officially, it has no standardized list of ingredients. PVC is known to contain such controversial chemical as phthalate. However some newer versions of PVC don't contain phthalates making them safe for use in medical and toy industries.
Plastic material designed to mimic the look and feel of human flesh. These composites don't contain phthaltes or latex however they are extremely porous and as such are not very share-able. Skin like materials melt easily and should always be stored in cool, dark places.