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.