Instruct: Classify a review into positive or negative sentiment.
Query: Water packs...not ice packs

I purchased these when pulling floating food out of a cooler started getting really old. I froze them and packed them in a cooler that keeps things cold for 5 days. We were leaving in the morning so I packed it all up around 11pm. By the time I was ready to leave at 8 the next morning these packs were completely defrosted and warm. In this cooler, ice stayed solid for 2 days. Not a good purchase.