High quality stainless steel double wall mug ? Mirror finish stainless steel inside for longer life ? Made of food safe 304 grade stainless steel ? Double wall protects your hands from burning by hot liquids inside ? Mug?s double wall also prevents cold liquids? temperature increase by body heat ? Comes with a cap to store your drink for later with flip top drinking vent protector ? Capacity 400 ml approx. ? Made in India ? colours Available: White, Blue, Red, Black