I saw, and jeez I cant remember for the life of me where, someone using a metal mug for cooking, and when they went to use it they put a rubber band type thing on the mouth of it to keep there lips from burning...

I use a titanium Snow Peak 700 mug. I love it. It cools quick, has markers to measure liquids, and a strainer for pasta.
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"To me, hammocking is relaxing, laying, swaying. A steady slow morphine drip without the risk of renal failure." - Dale Gribbel