My DH went to get a drink for me at the Sail Away party and I forgot to tell him to get the drink of the day so that it would be cheaper ( man, makes me so mad to learn all this good advice and then forget it!). He got me something that was red, slushy, fruity, non-alcoholic and in a souvenir cup- it was fairly flavorless and I know it cost $7 or $8.
We, too, waited around and picked up a couple of abandoned cups after the party ( did remember that tip!) and my kids tease me also about "stealing" cups.
My friend was with us and she "stole" a couple of glasses also. She had them setting out when she got home and her mom said, " OOH, is this what you got me from your cruise!?" She said she was so excited about it, she didn't want to say no- plus she had forgotten to get her anything! She made me promise not to tell her that it was free!