I love this mug it is now my new water bottle! First off the size is great it holds a large amount of liquid but its not super wide its more tall which is great because it fits in cup holders. It is insulated and when I put Ice in my water it was still cold  till a day and a half later!   The lid is push button and its smooth, it has a lock on it to prevent it from accidents. And inside its got a wide mouth pour spout to be able to easily drink from or pour your liquids into another container if you maybe carried soup or something! I love this mug it's amazing!!