JVR Stainless Steel Euro Mug 10oz 4P Set Using anti bacterial stainless steel 18/8 (304J1). Supplied from Korean Posco stainless steel. Double wall stainless steel structure. Rounded structure at inside the bottom edge of product for easier cleaning and suppressing bacteria from hiding. ABS exterior material for Shock resistant. Food-grade Stainless Steel 18/8(POSCO 304J1), ABS