Instruct: Classify the given review as either positive or negative.
Query: Red mug with hearts has poor quality glazing cup generates a lot of heat in microwave

I purchased 8 mugs from Fred Meyer in Eugene, Or. 1-2 years later all but 1 of the mugs are chipped. I would not purchase this product until the manufacturer improves the glaze. When the glaze chips off it takes a chunk out of the cup. At $8.99 per cup I am very disappointed.