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Title: Just right!
Review: ...meaning not too hot not too cold- mfg. knows what they're doing in the design... not the self-appointed "critic geniuses" spouting off left and right here.. Yes, put a coaster or lid atop your mug to retain even more heat if you need it warmer (will also lessen evaporation)...just common sense...lol! The diameter of the heated surface is apporoximately 3 and 7/16ths of an inch so it will accomodate a mug that's medium large in size(a little bigger than average).
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