SWbySWesty
Fauxverland Extraodinaire
I'm surprised I only saw one mention of dry ice.
Before I got my fridge, which as mentioned is my favorite, I stopped buying ice by freezing 2L bottles of empty soda containers with water. Those acted as my block ice. Then, if it was a trip longer than 2 days, buy a thin 2lb slice of dry ice (but be sure to wrap liberally in newspaper to avoid burning things on it!) which kept things quite cool.
I had a crappy cooler stay cold this way for 4 days - although it wasn't HOT outside and we took care to open in minimally, keep it covered and out of the sun.
Before I got my fridge, which as mentioned is my favorite, I stopped buying ice by freezing 2L bottles of empty soda containers with water. Those acted as my block ice. Then, if it was a trip longer than 2 days, buy a thin 2lb slice of dry ice (but be sure to wrap liberally in newspaper to avoid burning things on it!) which kept things quite cool.
I had a crappy cooler stay cold this way for 4 days - although it wasn't HOT outside and we took care to open in minimally, keep it covered and out of the sun.