This must sound like a stupid question to most but I am travelling to HAM this weekend and I'm not checking any luggage in just using my rucksake but as I will have liquids and have nothing to put them in so they are under the required measurement, then can I check this small bag in? I only usually see suitcases being checked in. I have already checked in for my EZY flight on Sunday from HAM to MAN will I have to check in again if I add a bag. I'm travelling Friday from MAN to HAM with LH don't matter this way as they don't charge for checked in baggage.