Mitre 20 oz Vacuum Insulated Stainless Steel Mug is made of stainless steel 304 interior with stainless steel 201 plus AS exterior that has a matte finish with comfortable welded handle and a clear plastic press on lid with sliding drink opening. Keeps beverages hot for 6 hours and cold for 8 hours. Hand wash only. FDA certified.
SS 304 inside and SS 201 outside and AS lid