Arrived well packaged to avoid damage in transit. For being made of glass, these are amazingly light. In fact, I keep telling myself to be careful - these aren’t plastic although they do feel like it.
You would think that the double wall would keep the contents hot longer, but it is no better or worse than any other mug. I wonder if they sell glass lids for these? That might help. The see through glass makes the mugs stand out.