I tried that with a metal Thermos camping mug but it needs to be constantly refilled with hot water to keep the inside warm.JohnnyO said:If I used a mug I'd maybe try a double skinned metal travel mug which functions much the same as a vacuum flask. Outside doesn't warm up, liquid inside stays much the same temp as it went in at for quite a while.
JohnnyO.
At the moment I am using a conventional Cappucino/hot chocolate mug that I bought from a local supermarket as part of a "Chocolate lovers" set (mug and tin of hot chocolate wrapped in cellophane).
Works well enough, although the large wide design & big handle make it look like an Elves chamber pot.