I wouldn't know what this product is like - it never arrived. They had to just issue a refund.

I bought this cup after working as a chemist in a lab. There, I learned how much plastic can slough off containers and cups, especially at high temperatures. Even though no links have been made between ingesting most plastics at small doses and health, I'd rather not ingest it. The cup is ceramic, a material that does not slough off. The lid is made of silicone, the same thing that covers baby spoons.
Unlike the previous reviewer, my cup has a hole on the lid through which you can drink (although it's more convenient to drink without the lid).
I addition, it can contain 12 ounces- the same size as a Tall cup at Starbucks. So go ahead and ask the barista there to make your drink in it.

This thing looks great...smell from the lid disappears after the first day or so. Biggest problem is that it *does* leak from around the silicone lid. To be honest this one thing is seriously making me consider stopping using it as my mug of choice...very annoying as in all other respects it's perfect.

Cup surprises others when used - we love the concept.
The lid does stain after only a bit of use.
Would love to know if lids are sold separately so we could plan to use this for a long time.

Great product - very unique - love that I no longer waste a paper cup every day at work! It's a BIT small (10 oz tops) and it's kinda weird drinking off a rubber top, but you get used to it. And the other reviewers are right: coffee stains the rubber top inside. But all in all, a neat item!