Love love love it!! I was actually looking for another brand's tumbler, but found Tea Beyond has this tumbler-Bought it for my own use: 1. very durable glass, good quality. it holds heat well 2. easy to clean. I do hand wash. 3. The lid can be used as a strainer holder or a small coaster 4. The glass walls allows easy to see when tea is ready 5. Strainer/tea infuser basket fits for regular size mugs-normally 12 oz. In other words, you can use your mug to brew tea with this strainer. The only thing I want to point out is that the lid is more like a regular lid on a teapot. So what it means is that you can't use it on your car. This tumbler is not kind of "Tea to go" tumbler. It's more made for in house use I feel-my personal opinion.