Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not so polar

I am giving this bottle 2 stars, because it seems to hold water fine.However, "polar" it's not. As soon as you put ice water in, you will feel the outside of the bottle get cold. The insulation in virtually non-existent. Needless to say, the contents warm up at pretty much the at normal rate for a non-insulated bottle.Bottle rating: fine. Insulation rating: scam.