Instruct: Classify Amazon reviews into positive or negative sentiment
Query: stick with thermos brand!!

Just returned this item as it was terrible in keeping liquids warm. on a cross country drive we bot it to keep water warm for a baby bottle. it was terrible. lost heat after a two hours and was completely cold after 4 hours. wished i had bot my thermos brand along. if the stanley company is reading this please note you have SERIOUS QUALITY issues. Felt totally scammed. I would not recommend this product. [...]hope this helps other customers.