Multi-functional bag

A multi-functional bag, comprising a pillar-shaped main body composed of an upper cover and a lower cover, a zipper, a carrying belt, a reception pocket, a thermal lid and a detachable thermal bag ;

• the upper cover and the lower cover being integrally connected at a hinge portion at an upper edge of one side of the lower cover and the upper cover and the lower cover being detachably connected at upper edges of remaining sides of the lower cover by the zipper, the carrying belt being disposed at a top of the upper cover, the upper cover having a lower portion attached to the thermal lid, an the reception pocket being directly attached to an upper edge of one of the remaining sides of the lower cover, the reception pocket being extendable and retractable relative to the lower cover, the thermal bag being attached to an inner wall of the lower cover, the thermal lid corresponding in shape and size to the thermal bag.