Hi All, my planned travels next year include flights on Czech Air and Easyjet, both with different baggage allowances. Czech is 15kg checked and 8kg carry on. Easyjet is 20kg checked and no weight but 50x40x20 size limit. So what I want to get is an appropriately sized carry on bag that weighs next to nothing and folds into nothing so I can just use it for these flights to balance the weight. If the bag lasts 3 flights and I throw it away, that's fine. Any suggestions ?