The Doctor Bag, that is. Doctor bags, formally known as the Gladstone bag, are the hot new bag style for 2012. This has been a popular trend in the past, and now it is coming back. It is an oversized box-shaped bag that can hold just about anything. As a lady that carries just about everything in her bag, this will definitely be a must-have on my list. Posted above are some great styles from Louis Vuitton and John Galliano.