There are many different types of vibrators, the main vibrators you will find for sale online are made from silicone. Some cheap vibrators are made from phthalates, which is a material compound that can upset the body’s ability to regulate hormone production and it has been noted that it can be linked to cancer.
PVC plastic sex toys have become hugely popular over the last few years. The toys that may contain phthalates are the ones that are like soft jelly. When purchasing a vibrator online, be sure to check that it is phthalate-free.
If you are worried about using a plastic vibrator you can always purchase a non-porous toy like a stainless steel or a glass vibrator that does not harbor bacteria in its surface. These can easily be sterilized with boiling water.
Finally, alternate materials that can be safely used are as follows: Metal, glass, medical grade silicone, ceramics, wood, stone and crystal.