Dry ice in a rotomolded cooler works, but don’t seal it shut

You can use dry ice in a modern rotomolded cooler, but you have to leave the lid not fully latched or you risk the thing exploding.

The problem is pressure. Dry ice doesn’t melt; it sublimates straight into CO2 gas. Your Yeti or Pelican is built tight enough that the gas has nowhere to go, so the lid bulges, the gasket gets pushed out, and eventually something gives. People have cracked the hinge or popped the