To avoid harmful materials and risks, it's recommended to choose sex toys made from non-porous and toxin-free materials such as silicone, glass, or stainless steel. These materials are easy to clean and free from harmful chemicals. 100% medical-grade silicone can withstand high temperatures and can be boiled for sterilization.
Manufacturers sometimes mix materials to make the product cheaper or fail to disclose the content on the product packaging, especially if they are made in countries with less stringent manufacturing standards. Therefore, it can be helpful to check which brand the product is produced by. Does their profile focus on being as cheap as possible, or do they care about creating quality and durability? Is the material really what they say it is?
*Ref: 1. Li, W., Huang, Y., et. al., (2021), 2. Oehlmann, J., Wagner, M., et al., (2017)