Our Eco paper cups are totally safe for you, cause they are made with FSC certified paper and Corn starch in inner linings. Conventional paper cup uses wax or artificial ingredients as their lining, which gets dissolved with the drink and might harm human body. Where as, our Eco Cups absolutely look like plastic cups, but are 100% certified biodegradable and compostable. They are made of cornstarch or polylactic acid (PLA).