Firstly, the quality of the cooler box is a crucial factor in determining its cooling effectiveness. High-quality cooler boxes typically have better insulation and sealing, which means they can more effectively maintain a low internal temperature. Thick insulation can reduce heat transfer, while good sealing design can prevent external warm air from entering the cooler box, thus extending the cooling time.

Thirdly, the quantity and type of ice or coolant used are also important factors affecting the cooling duration. Ordinary ice cubes in a high-quality cooler box can usually keep food and drinks cool for 24 to 48 hours. If dry ice is used, the cooling effect may last longer due to its much lower temperature compared to regular ice. Additionally, there are various specially designed coolants and ice packs on the market that typically have better cooling performance and can be reused.