The insulation time of an insulated bag depends primarily on the bag's thickness and material quality. Generally, a high-quality bag can keep food warm for approximately 4-6 hours. However, it's important to pay attention to the temperature of the food and how the bag is used.
For hot food, carefully control the temperature before placing it in the bag. It's best to place it in the bag immediately after cooking or heating. For cold food, refrigerate it for a while before placing it in the bag.
To ensure effective insulation, seal the bag tightly to prevent excessive air from entering. Avoid prolonged exposure to direct sunlight or high temperatures.