Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't keep cold long

concept is wonderful but could be made much better. Plastic is really thin. Feels like it will break fast. Lid seems flimsy like if I were to drop it, all the contents will fall out. Also, the ice keeps cold for about 30 minutes. But I do like the compartments w/in the compartments. Overall, I think I wasted my money.