Interesting Thermal can. I did a little research the AeroVoiD Company became the Vacuum Can company and did have a US military contract in 1984. The contract number is DLA400-81-c-3034. So the US military did use them. But as i remember the Mess Section just threw a #10 Can of coffee into a boiling 30 gallon pot of water. I am still trying to get the grinds out of teeth. So long ago. What winter fun in Graf.