The ice retention would differ depending on the model.

Provided at least ⅓ of the cooler has ice or ice subs, the ice retention is as follows:

• Standard ⅓ gallon jug - up to 8 hours
• Regular Coolers - 1 day
• Xtreme Coolers - 3 days

You can refer to the cooler's tag to know how long can it keep ice.