Hello
pjcarr
Regarding your questions:
First i will tell you something more about this little test. It involves psychology because they (EY) look at the way you talk, the way you seat, the way you speak, all of your gestures even the way you leave.so take great care of how you put your hands it is better to put them on your knees. cause if you keep them crossed to your chest is like you are protecting something.....anyway read some psychology just few aspects about gestures interpretation issues, you can find them if you search the web.
As for what to chose i would go for the bottle of watter as is a key element for surviving and also is flexible and you can change it form....there are different aspects here.
Coming now to the question after how long? It clearly states at the interview that you can reapply after 6 (six) months.
Regards and Good luck!