I use ice packs pretty exclusively now or with a 10lb bag of regular ice. Easily a week in any cooler but the coleman xtremes are great coolers for high capacity (120+). I just won't spend $300+ on a cooler when the coleman xtremes do 90% of what the high dollar ones do. I do own a pelican extreme 65qt and a few really expensive 20-40qt soft coolers, but that;s the max I would spend on a small cooler that's not being used to keep game cool.
Get any 5lb ice packs and a couple bags of ice and you're good for a week at least.
Get any 5lb ice packs and a couple bags of ice and you're good for a week at least.