For taste, Ceramic With Steel Mug is your ideal alternative. It absorbs nor imparts tastes, leaving coffee to taste like it should.
Double Wall Coffee Mug Keeps Coffee Hot. Regardless of what sort of mug you choose, a double-walled one is going to keep your coffee hotter more than the usual single-walled one. The difference is particularly evident during winter using stainless steel and ceramic cups, that can be vulnerable to heat reduction. (Ceramic will keep coffee hotter longer than glass, but we have yet to see somebody create a travel mug from glass.)
Since java changes as it warms, maintaining it as sexy as possible as long as possible can allow you to enjoy all of the nice notes at a boil.