This productIt's a special luggage with thermal insulation properties.，Retain chill/Retains heat, product insulation layer is pearl cotton+Aluminum foil tin foil, offering excellent heat insulation and preservation; ice packs are packages with constant temperature effects, capable of preserving cold./Retains heat (acts as warm in winter and cool in summer), featuring a thick thermal insulation layer,Offer excellent thermal insulation; the product folds for easy portability. The portable, lightweight, and stylish design keeps food warm and fresh for extended periods, is convenient to use, and is suitable for outdoor picnics and daily life (e.g., for children carrying lunch to school. It allows for the enjoyment of fresh food at any time while ensuring health and hygiene.)Custom production to meet customer requirements.