First of all, they are Flight Attendants, not stewardesses. Secondly, I really think you are nitpicking. I've always gotten a glass of juice or soda and not the entire can. This is not just on TED but every airline. There is only so much they can store on those short hop planes and this allows them to make sure they have enough for everyone. It was great you got it on your first flight but it's not the norm.

You instigated the second encounter with your service with a smile remark. Why couldn't you wait a minute? You already had your beverage but the passengers they were serving did not. If you were one of those passengers, you'd be complaining that you had to wait.

If this little encounter is the worst thing that happened to you while flying, I suggest you count your blessings. Flying today is not a pleasure but rather something to be endured. Flight delays, cancellations, rude employees seem to be the norm. One reason I can think of is that everyone wants cheap fares but no one wants to put up with the lack of service that comes with them.