Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Wouldnt buy again

The only time I used this warmer was when I took it out of the packaging to test it. Then I put it in boiling water like the instructions said for 15 minutes to "reactivate." And it never reactived the crystals; needless to say, I put it back in the box and its been sitting there. Save yourself the money! Still looking for a decent travel warmer.