Let me preface by saying this is the first time I've ever bought a cooler. I don't know how long a cooler is typically supposed to keep ice...well, in ice form, so take the rest of this review with that in mind. I bought this for a trip I was taking. It was 2 days of travel each way, so I bought a small bag of ice before setting out the first day. By the start of the second day, it was mostly water but it was still cold enough that I didn't feel uncomfortable leaving my stuff inside overnight. If coolers are supposed to make ice last longer than a day, then I suppose this one didn't work as well? However, for my purposes it was more than good enough. And for a day trip, it'll be even better!