When travelling, refrigeration becomes a major issue. Having a cooler, electric fridge, or ice chest is the way to go. You can get ice from almost everywhere, and it ranges in price from free to costly. When staying at hotels, they may discourage you from filling up your ice chests from their machines, but there are ways around that. The cooler bags are great because they are flexible and can conform to the tiny opening meant only for ice buckets from the room. Fill up your bag there or do the tedious method of filling up the room bucket and poor into your chest.