Bests & Worsts Reviews from Amazon

Some people love this cup and others hate it. I think that the reason for this is in people's expectations and how they take care of the tumbler. I've had it for over a month and I use it all the time. Is it perfect? No. But I didn't expect it to be. Here's the reality. It's a double-chambered system. Whether or not the space between them is vacuum-sealed or not is unknown. Will this significantly reduce the amount of condensation that drips on your table? yes. Will it eliminate all condensation on the outside of the glass? No. If there is a significant temperature difference between the inside liquid and the ambient room temperature, then a fine condensation will form. Of course, if you fill it with ice and some liquid then put it in front of a heated source (e.g. your laptop's heating vent), then the condensation will be greater. But usually, the condensation is like a fine mist. It's a huge improvement to the sweating that was happening with my glass tumbler. Some reviewers have complained about a bad taste. Yeah, I noticed a taste for the first couple of weeks, but then it went away. I even did a wash-out period of going back to my glass tumblers for a week and then trying the Tervis tumbler again to make sure that I wasn't noticing the bad taste because I had gotten used to it. I haven't used it with hot liquids because I don't drink hot stuff. I also have noticed from several reviews that people complain about their dishwashers damaging the cup. In general, I think for a cup with this type of construction, you shouldn't tempt fate by washing it in a dishwasher. It design (wider mouth than bottom) makes it easy to wash by hand. Lastly, some reviewers have complained about the lip of this tumbler. It's true that the lip is not perfectly smooth. There's an edge on the outside where the inner and outer walls were joined. At first it was annoying, but once you keep using it, you'll adapt and forget all about it. This cup isn't perfect, but for $15 and the right expectations, it does a hell of a job. note: make sure to click "helpful" for all reviews that you like. It motivates good reviewers to keep everyone well-informed about products.