Borosil Insulated Coffeemate Mug 300 mlDescription Product details Material : Inner wall: SS 304 Grade; Outer wall: SS 201 Grade Colour : Black Capacity : 300 ml Warranty : This product is under one year warranty from the date of retail purchase against any manufacturing defects in material and workmanship. The warranty does not cover damages resulting from accidents, mishandling or tampering with mechanism. Warranty valid against producing original bill endorsed by the seller. 1 year