Want to look flashy in a retro way without being trashy? The Boombox bag with built-in speakers seems like just the thing to have, where all you need to do is plug in your MP3 player (or other compatible devices) and you’re good to go. While we can’t expect high-end audio quality from this, we can be sure it is able to perform decently to disturb the general peace around you. While the yellow-green bag seen here is out of stock, you can always settle for the classic black model which goes for £30.