Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not a cooler

I purchased this cooler at a large retailer in Chicago (so I'm fairly certain it's not a fake if those even exist). This is a lunchbox, not a cooler. If I put drinks and ice in it, the ice is mostly melted within 90min and completely melted within 2.5hrs. My 10yr old handheld Coleman cooler (standard model, not 'maxcold' or anything like that) goes 4hrs before ice begins to melt and can keep drinks cold at least 8hrs, even in the summer sun. I think Igloo should spend less time on fancy product design and more on basic insulation. I don't understand the disparity in reviews for this product so I recommend moving to one with consistently positive reviews.