Stainless Steel Hand-carried Mug Creative Ideas For Men And Women $ 15.19 Product information: Style: Straight Cup Liner material: 304 stainless steel Shell material: 201 stainless steel Insulation performance: 6-12 hours Material: 304 inside and 201 outside Style: modern and simple Function: household, portable, vacuum, heat preservation, customizable Packing list: Insulation Cup X1