We have had a mini Keurig for over five years.  The opportunity of having a travel cup to work with the brewery is great.  However, this is not a cup I like to use.  I don't like the plastic lining; stainless steel would be much better 
The second feature I don't like is the lid.  It screws on.  This means a threaded line is where your lips meet the cup.  Not a comfortable thing.
Would love to see these features corrected and, perhaps, a little wider so the cup holds more liquid.