Originally only came in 8 oz. However, the can is divided into 8 compartments of 2 oz. Soon to be discontinued, although a lot of people are going to keep drinking it after it's no longer available. At first came only in a 16 oz.
All cans look identical.
When you take one from the fridge, it opens itself. The ingredients list is not on the can. A notice on the side reminds you to drag your empties to the trashcan. The latest version of Mac Beer comes in a can with two tops and you can get Mac Beer or Windows Beer from the same can. However, you will need the latest Mac fridge to keep it in.