This case is convenient for surf trips and easy for women to handle, capable of storing items like plastic bottles. The interior structure has been improved for better heat retention, cold retention, and waterproofing. It has a capacity of approximately two 1-liter plastic bottles. It can hold four 500ml plastic bottles, with extra height remaining. Although new, it has been stored for a long time and may have dust and dirt. There is also a possibility of deterioration due to sun exposure, so please consider this before purchasing.