this got me thinking... have you ever seen a can of pringles chips on a plane? before they are opened the freshness seal is bulging outward. so if a can with air in it acts like that at altitude, my question is, can I take an inflated rugby ball with me on the plane without it exploding? would it be different if i had it inside the cabin with me as it's pressurised or if it was in the lower unpressurised part of the fuselage in my checked baggage. anyone taken a ball with them on the plane. what happened?