Heavy-Duty Super insulated Thermos Mug

I have a stainless steel Thermos mug that I bought in 1995 and it still is one of my prize possessions. In summer I fill it with 8-10 cubes of ice and add my cold coffee and the ice doesn't melt, so the coffee is super delicious. I even drink beer the same way, with 8-12 ice cubes. The ice doesn't melt so the beer is truly ice-cold. The next morning the ice cubes STILL haven't melted. In the winter my house is freezing cold and I use the mug for hot coffee and it stays piping hot.