Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Does not do the job, luke warm coffee after 4 hours

I got this based on the other reviews but I have to say it was a big disappointment. Coffee is barely warm after only four hours so we end up microwaving it. Will probably put this one away and only use when we have company over and are serving a quantity of coffee. Regret making the purchase.