Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good but it does not go the distance

I bought the fridge-to-go bottle holder to transport breast milk on a recent 12 hour trip. The holder states on the packaging that items should stay cold up to 12 hours so that is why I purchased it. I followed the instructions and put it in the freezer a week prior to using it and I kept it out of the sun and heat. It did keep the milk cold for most of the trip; however, I was not confident in the milk from hours ten to twelve so I poured it out just in case the temperature was not cold enough. I did not want to risk getting my son sick if the milk was bad. Overall, I think the product was good but I would not rely on it for twelve hours.