Material Stainless Steel, Silicone Capacity 800 Milliliters The sweat-proof lunch box is made of 304 stainless steel BPA,phthalates lead and PVC free.Durable stainless steel interior and exterior are perfect for your healthy meal plan Superior Insulated Food Flask: Double wall vacuum insulation technology keeps your healthy, homemade delicious lunches, soups and snacks hot for up to 8 hours or cold for up to 6 hours.For maximum temperature insulation,please pour hot & cold waterin the storage jar to preheat or pre-cool for 5 mins before packing food. Large Capacity Food Jar: With 27 oz (800ml) capacity, this food jar is big enough to fit an entire meal yet small enough to fit nicely in kids lunch boxes or adult lunch bags.The lid with a built-in hand is convenient to carry The outer lid with a built-in handle is very convenient to carry on the go.Food grade plastic serving bowl and a folding spork included to make you eat like in home.The base of the jar is non-slip and scratch resistant.Wide mouth is easy to fill, eatfrom and clean With silicone sealing ring,the food jar has been full sealed to prevent spilling accidents.Perfect to carry soup or food to work or school. The air button on the inner lid is for prevent burning accidents by the hot air pressure.(PLEASE NOTE:Use somethingelse except fingers to press down air hole before open the inner lid)