Lunch bags are a trap. Get a soft cooler.

For hot-weather hikes and fishing trips, a proper soft-sided cooler beats every insulated lunch bag on the market.

Most “insulated lunch bags” have thin walls and cheap zippers that let cold escape fast. Fine for an office desk, useless in direct sun on a riverbank. A real soft cooler — think Yeti Hopper, RTIC, or a thick-walled Engel — holds ice all day if you pack it right.

The trick: the bag matters less than the ice. Freeze two water bottles the night before, use them as ice packs, and drink them as they melt. Add a proper ice pack if you’re carrying anything that spoils — meat, dairy, mayo. And don’t leave the cooler sitting in the sun; tuck it under a tree or rock overhang.

For a day hike, 6–8 liters is plenty (Yeti Hopper Flip 8 or the RTIC equivalent). For fishing, you can go a little bigger since weight matters less. Skip the cheap bags — they sweat, they leak, and lukewarm chicken doesn’t taste great.

Warm mayo ruins more trips than rain.