Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This mug is outstanding.

I bought this mug to keep my coffee warm at work. I used to refresh my coffee at work about 6 times a day, now I do it twice, and only because I run out. This thing keeps your coffee drinkable hot for at least 5 hours. To test it, I filled it full for the return trip of a visit to a family member. I went at 4:30PM, left for home at 9PM. Drive home was an hour, and the coffee was hot for the hole ride home.