‌From luggage dimensions to what items you're permitted to bring on board, it often seems as though the guidelines have shifted since your last airport visit. ‌So to help make sense of it all, an Aer Lingus insider has revealed the one crucial step you should take before every baggage check. ‌Aer Lingus has shared advice from someone "who works at the airport every day" – and you'll definitely want to pay attention to these tips for your next flight. Pack your carry-on for comfortThe Aer Lingus staff member advised thinking carefully about comfort when packing your carry-on bag. Article continues belowPack a reusable water bottle"Bring an empty water bottle with you, and fill it after security," the Aer Lingus worker advised.