Love this thing. Retains ice for well over 24 hours in days over 85 / nights over 65 weather. Every drink we pull out of it is colder than fridge temps … plastic water bottles usually have little ice chips. Super easy to carry, floats around the pool or beside the kayak. Has a very rugged feel to it, although I doubt the way we use it will ever really test its durability. Only a single drawback - fairly narrow cylindrical design means that, if you have more than one kind of beverage loaded in there, you’re apt to be rummaging a little more than you’d like to find the specific drink you want. Overall, one of the easiest 5 star reviews I’ve ever given any product. Get it. You won’t be disappointed.