I love this travel mug! I have dropped it, it has rolled on my car's floor and nothing has spilled out of it. As clumsy as I am, this is impressive. Literally no leaks at all. It also keeps my coffee warm for a few hours and my juice cold for just as long, probably longer. I wash it in the sink most days because I use it every day and don't use my dishwasher every day. Though I do occasionally run it through the dishwasher as well and haven't had any problems with it in there. Great mug for those of you who need a good drink on the way to work!