Ember Travel mug is too small and it doesn't keep the coffee hot very long unless it is on the charging pad.  I have to leave it on the charging pad for the coffee to be at a temperature that I like it or it gets too cold within 15min.  I wish they could fix this flaw as well as make a bigger one.  I do like the thin size which makes it easier for gripping and holding.  Maybe make a taller one that holds the heat a lot longer.  I haven't used it for cold drinks.  Just my coffee.