72 hours of cooling that is beyond your wildest dreams. It requires a ton of ice and the next morning you will find cold water simply. A simple polystyrene cooler keeps much longer. With the 50+ euros I spent, a much better one can be found. It is not convenient at all for transportation, it should have handles. The only positive thing is that it seems to have a durable construction and can also be used as a table, etc. Otherwise, from me, NO!