Cooler bag

A cooler bag, comprising:

• an outer housing that includes a housing body defining an inner space therein and being heat insulated, and two handles connected to said housing body, said housing body including two housing side walls that are spaced apart from each other in a width direction, and two housing lateral walls that are connected to said two housing side walls and that are spaced apart from each other in a length direction perpendicular to the width direction, each of said two handles being disposed on a respective one of said two housing side walls;
• an inner case that includes a case body detachably disposed in said inner space, defining a storage space therein, and being heat insulated, and a carry strap connected to said case body, said case body including two case side walls that are spaced apart from each other in the width direction, and two case lateral walls that are connected to said two case side walls and that are spaced apart from each other in the length direction;
• a sealed lid that is disposed on said case body in a height direction perpendicular to the width direction and the length direction and that covers said storage space;
• and
• a plurality of buckle units that are disposed on said sealed lid and said case body and that are spaced apart from each other in the length direction, each of said plurality of buckle units including a male buckle strap that is connected to one of said two case side walls, and a female buckle strap that is connected to another one of said two case side walls and that is detachably connected to said male buckle strap such that said male buckle strap cooperates with said female buckle strap to abut against said sealed lid and to prevent said sealed lid from moving relative to said case body in the height direction.