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Thermal Food Jars

We tested six thermal food jars to see if any could keep their contents not only palatably hot or cold but also food-safe for several hours.

What We Learned

Thermal food jars are small, insulated, stainless-steel vessels that promise to keep food hot or cold on the go. We wondered if any could keep their contents not only palatably hot or cold but also food-safe for several hours since the U.S. Department of Agriculture discourages leaving cooked food between 40 and 140 degrees for more than 2 hours. So we filled six models (priced from...