Phrase
luggage that is transported in the cargo area of the plane
checked baggage
B: Totally, the compression bags make more space. But be careful about weight limitations on checked baggage. Luggage can get really heavy when you pack it all in!
bring on board
A: Will do... actually I only travel with a carry-on and backpack. What do you do about the liquids and gels they don't let you bring on board?
run out
B: Well, I just don't bring toiletries over 100ml. I typically don't run out. But then hey, I'm not a world traveler like you! Will you be gone long?