Safe Eco Friendly Material (BPA-free) This material is eco friendly. It is safe from endocrine disrupter(BPA-free) by using proven quality stainless steel 18-8 (27 kinds / POSCO). And resource recycling efficiency is easy even when product life is over. All raw materials used in DKINZ airtight containers are from Korea, and the entire process is managed and produced in Korea. It is a product of 'Korea' that you can trust and use.