What you should know before your next flight

We've all done it.

We've all stared at that half-full can of soda that's just been poured into our cup, wondering what the flight attendant plans on doing with the rest of it.

But here's the thing -- you can have the whole can, you just have to ask, they'll give it to you.

This and other pearls of wisdom are being shared by pilots, flight attendants and cabin cleaning crew on the social-news website, Reddit, much to the delight of travelers who don't often have such a frank exchange with the people who know the skies the best.

Even if you already know about airlines' "give 'em the whole can" policy, chances are there are passenger nuggets in the Reddit story you don't know about.

Read more