Made from silicone, which is non toxic & hypo allergenic. Silicone has few open pores, so it does not harbour or promote bacteria or fungus growth. Because of its high heat resistance, silicone can be boiled to sterilize, is dishwasher safe, and dryer safe. Silicone does not fade or retain odor, and is sturdy and easy to clean. Silicone does not contain toxic chemicals like bisphenol A, leave, PVC and phthalates