This historic lunchbox was designed to protect a miner's meal from coal dust, moisture, and mine rodents. The container typically featured a tight-fitting lid and a D-shaped cross-section, allowing it to be strapped to a belt or hung from a timber prop. Although plastic coolers have largely replaced them, the metal version remains an iconic piece of coal industry heritage.
Heard on the job
Hang your snap tin on that roof bolt so the rats don't get into your sandwiches.