Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cool on heat

This 2 qt vacuum bottle boasts it will keep your hot brew hot for apprx. 24 hours. Following filling first with boiling water and allowing to sit, before adding my hot beverage, I found it only kept coffee hot to warm for about 6-8 hours. Far short of the boastful 24 hours.For you coffee drinkers, who intend on making a long day of it, in the on coming cooler season stay clear of this one. Suggestion: if you take milk with your coffee, heat it before adding. You may get closer to the 24 hr mark than I did.Leaving by your campfire may help keep its heat as well.P Coleman