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I went through four different ice packs before landing on ones thin enough to slide under a sandwich without making the whole box a game of Tetris. These actually stay cold past noon, which was my bare minimum requirement.













Half the battle is finding containers that don't leave weird gaps where the cold air escapes. These stack cleanly on top of a flat ice pack and actually use the space in the box.













A flat ice pack is useless if your lunch bag has zero insulation. I learned this the hard way when my daughter's cheese stick turned into a cheese puddle in a thin tote bag last June.













These aren't the star of the show, but they fixed specific problems that were driving me nuts. Leaky dressing, warm drinks, soggy bread. Small fixes, big difference.











