About this item Material type: 304 Stainless Steel; No. of pieces: 1; Capacity: 270 ml Insulation type: Double wall; Temperature retention: Yes ; No sweat Exterior (Keeps liquid hot/cold); 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.