The inner liner made with 304 stainless steel,surface made with PP. Lunch box can be combined as colors or structure needed. Equipped with sealing cover, its safety buckle can makes lid and box body be buckled tightly that hold liquid food without spilling, safe to carry and a vent hole can let the food in box to be better sealed. Suitable for outdoor, travel, picnic, business, schools, gym and more. Kraft Paper Box package by default, felt insulated lunchbox bag is optional. 6.5" Diameter x 8.07" H