I bought this withbthe expectations of 4-5 days for ice retention. I have had it several weeks andvthe best i ve gotten is teo days with day two being mostly water and some ice on a day in the 80s.  I pre chilled the night before.  Since then i have gotten 1/2 day if lucky in 90-95 degree weather with cooler being in the back of my truck. I leave water from previous dayin the 
cooler To help keep the cooler “cool” overnight. Thought i was getting a good cooler at abgood price.  Thinking i should have paid more for another brand. Not convinced i am getting a good seal around the lid. Seems gasket should be a little thicker.