You know, I didn't want to bring anything that someone would bring on their own either... but then I thought about when i'm on a trip and I bring it... but I don't ever bring enough! And that stinks. So, what the heck.
The main things for me that I really wanted in there are
*Bag - duh!
*Mug - some may bring their own, but I think it's fun if everyone has one that matches, and some will forget their own!
*Playing cards... most forget these and it's great for bar games!
*suntan lotion - all though all will bring it, these are little tubes. Easier to take on excursions. And a lot of people underestimate the amount of sunscreen they'll use!
*Lip Balm - I just love chapstick!
*Gun - yeah, who won't use that?
*Shout wipes - margaritas stain!
*First aid kits - not many people remember these things when packing, and sadly I think they'll get used!
*Off wipes, not many people know of the sand mites at night. These will come in handy
*Tums - can always use more!
*Imodium AD - can never pack enough!
*Tylenol - who knows when you'll get a headache!
The rest is just random fun crap...