Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Trudeau mug - less than impressed

I purchased this stainless steel mug to replace a Starbucks stainless steel mug that I lost. (The Starbucks mug kept coffee hot for several hours.)I was looking for a stainless mug with a tapered base to fit in my car's cupholder, and this cup fit perfectly. The problem with this mug is that although it is stainless steel, it only keeps the coffee hot for about an hour. I am currently using a plastic Starbucks mug that keeps coffee hot for about the same amount of time.Another thing I do not like the that the coffee has to pass through the valve apparatus, which affects the taste and limits the flow. Keep in mind I often like to gulp my coffee. Even though I clean the valve often, it seems to get dirty and affect the flavor.A spill-proof mug is not an important aspect for me, but the Trudeau did fare well in this regard.