Materials

• Insulating Layer: Usually made of materials like polyethylene foam (EPE) or polyurethane foam, which have low thermal conductivity, helping to slow down heat transfer and keep food at the right temperature.
• Outer Layer: Commonly made of waterproof and wear-resistant materials such as polyester fabric or nylon. These materials can protect the inner insulation layer from damage and prevent water from seeping in, ensuring the bag remains functional in various weather conditions.
• Inner Layer: Often made of food-grade aluminum foil or a heat-reflective material. Aluminum foil can reflect heat, reducing heat loss or gain, while also being safe and hygienic for contact with food.

Types

• Single-layer Insulated Bags: These are relatively simple, mainly consisting of a single layer of insulating material. They are lightweight and suitable for short-distance deliveries or when the temperature retention requirements are not extremely high.
• Double-layer Insulated Bags: With an additional layer for better insulation performance. The double layer can be composed of different materials, such as an outer layer of durable fabric and an inner layer of thick foam or aluminum foil, providing enhanced temperature retention for longer delivery distances.
• Multifunctional Insulated Bags: Some insulated bags come with additional features like built-in pockets for utensils, napkins, or mobile phones. They may also have adjustable straps or handles for easy carrying and can be used for other purposes like picnics or grocery shopping.

Sizes

• Small Size: Usually with a capacity of 1-2 liters, suitable for delivering a single meal or a few small items like a cup of coffee and a sandwich.
• Medium Size: With a capacity ranging from 3-5 liters, can hold 2-3 regular-sized takeout boxes, which is suitable for normal family meals or orders for a few people.
• Large Size: Can have a capacity of 6 liters or more, designed to hold large quantities of food, such as for group orders or family gatherings.

Maintenance

• Regular Cleaning: Wipe the inside and outside of the bag regularly with a damp cloth to remove dirt and food stains. Avoid using harsh chemicals that may damage the material.
• Proper Storage: When not in use, store the insulated bag in a dry and ventilated place. Do not fold it for a long time in a way that may cause deformation of the insulation layer.
• Check for Damage: Periodically check the bag for any signs of damage, such as tears in the fabric or damage to the insulation layer. Repair or replace the bag in a timely manner to ensure its performance.