The Car Essential Oil Diffuser by Auto Sent Pod is made from 100% high grade 316L stainless steel which is completely oil compatible and made for the use of diffusing all scents including the powerful citrus essential oils. Essential oils are highly concentrated; therefore, no paint, glue, or other materials have been used so you don't have to worry about getting paint all over you or your clothes. Our diffuser have strong magnets to keep it shut and is durable making them perfect for everyday use.