Instruct: Classify the given review into positive or negative sentiment.
Query: CUTE BUT INEFFECTIVE

THE VAPORS LAST FOR A FEW HOURS EVEN AFTER A REFILL, AND THEY ARE COLD. THEY DO NOT SPREAD INTO THE ATHMOSPHERE BUT WILL MAKE A MESSY WET SPOT ON YOUR CARPET ALL AROUND THE OBJECT. HARD TO REFILL ALSO.