Adopting an up and down folding structure, it can accommodate sandwiches in the folded state and salads or other large portions of food in the unfolded state. This innovative folding structure is not only suitable for food storage, but can also be extended to travel storage, etc., enhancing the market competitiveness of the product. Using food grade silicone material to ensure safety, suitable for storing cold or hot food, and easy to clean. It can also be used as a travel storage bag to organiz