We have a great little feature called 'Viewed', found on the bottom left hand corner of our website.
This will store the cartons you've been viewing and at anytime you can click this, a pop up list of cartons will appear. If you are not logged in and you view cartons the new views will also be recorded here. When you login you'll see your last viewed cartons and any new views. Just click on a carton in the recent list and you'll be taken to the carton screen.