Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Over 2 years of spill proof wonder

The double stainless vacuum wall keeps coffee hot, and the leak-proof lid is really leak-proof. I carried this mug almost everyday for over two years now, and no drips. I love that it can tumble out of the car cup holders without worrying about spills, stains, or hot coffee on my lap.I do hand wash mine, as the user manual says it's not dishwasher safe.Not only does the stainless double wall keep your drink hot, it doesn't add any off flavors like plastic does. Nothing spoils fresh-roasted, fresh-brewed coffee more than plastic overtones.The construction is very durable. This mug will take being dropped, kicked, and crammed into crevices. I suspect I will eventually have to replace the o-ring on the lid but haven't had to yet. If I ever do have to replace the mug, I will be replacing it with the exact same mug.