Instruct: Classify Amazon reviews into positive or negative sentiment
Query: They work!

Forget to open your reds to breathe? Can't get the hang of swirling your wine without spilling? Every sceptic who laughed at my insistence that these glasses with their ridges made the wine taste better did their own taste test. Then they had to admit I was right. Thin like Reidel... and, like Reidel, they need hand washing. Only drawback!!!