Material type 304 Stainless Steel No of pieces 1 Capacity 270 ml Insulation type Double wall Temperature retention Yes No sweat Exterior Keeps liquid hotcold Leak proof No Wide Mouth for easy cleaning Inner and Outer side of mug is made from 304 Grade Steel which is Rust Free and 100 Food Grade Curved handle for easy grip Easy close lid with silicon seal for spill proof Best Usage Great for all kinds of hot and cold beverages designed for coffee tea juice etc