Should I buy a cooler organizer?

Yes, but only if you have a premium rotomolded cooler from brands like Yeti, Pelican, RTIC, or Orca, and you need to separate raw meat from drinks or keep ice on one side for week-long camping trips. For day trips with cans and sandwiches, a mesh bag or dollar-store basket works fine. The downside is paying $30-60 for a plastic accessory that only fits that cooler, and the cooler itself starts around $200.