Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointing product that did not hold up

I bought the Thermos Foogo jar for my preschooler based on the fun colors and my good experience with other Thermos products. This jar did not hold up. First, the plastic base came off - more an annoyance, as it is merely a shallow "cup" that sits on the bottom end of the stainless steel jar. I glued it back on several times. After about six months, the vacuum seal evidently broke down, because when I filled the thermos with hot food the outside of the thermos became hot to the touch almost immediately, indicating that the jar was not holding heat. At that point I threw it out, since the jar no longer kept food at a safe temperature. I have other Thermos products that are much older and that have not developed these problems so this might be a quality control issue. At any rate, I've replaced this jar with a different model.