GUS 30 oz stainless steel tumbler
I like the tumbler, although my hand is too small to grasp the top which makes it a little inconvenient.  It does keep the correct temperature for quite a long time.  If ice is used, there is no moisture on the outside, though it is cold to the touch.  A positive comment is that it holds a large quantity of liquid! The picture shows what appears to be a brush for the straw, though there was not one enclosed with my order.
Rating: 4 stars