Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointed!

I purchased two of these cups, two weeks ago and I'm already looking for a new one. I looked at the reviews on here, and they were overwhelmingly positive regarding the quality & performance of this suction cup. The first one I used lasted a week, before the black part separated from the back. The second one, only lasted one day! What's disappointing is the temp didn't even make it to 80 degrees that day.