Is this backpack with a built-in vacuum system the key to avoiding baggage fees?

With airlines charging a premium for both carry-ons and checked luggage, the ultimate cost of flying from A to B tends to end up considerably over the price of your flight ticket. Maximising the usage of your free under-seat cabin bag is an easy way to save some money – should you use your allowance savvily. Amsterdam-based brand Airback has created a would-be solution to overpacking woes with its signature backpack, which has a vacuum-sealed section designed to help you squeeze more…