Well I ordered and received this set as a gift for my son.  Boy is he
going to enjoy this.  The coffee mugs and espresso mugs are very heavy
and should hold the temp. well.  I can just see this in his family room
along with the life size figure of Yoda.  His Fiancé will be less then
thrilled, but hey, she will learn.
I am enjoying the combined use of a Roaster and Grinder for my morning
cuppa.  I didn't know what I was missing.  I roast 3-4 batches once a
week.  Each batch just fits in a small Ball jelly jar and is 8-9T of
ground coffee after grinding.  Yum!