I put ice in mine for a week straight with nothing else in it to precool it, mine wont keep a bag of ice for crap, by the end of the second day its all water. Precooling mine doesn't help hardly any. I bought mine for a trip to florida, precooled it before we left, my father in law had a cheepo wally world special with him that keep ice just as good as my yeti and he did not prechill at all. From all the reading ive done on them the little coolers are just not going to keep ice like their bigger ones.