First of all, thank you to everyone in these threads for all of the ideas! They were so helpful in deciding what to put in our bags. We're excited to give them to our guests and we hope they enjoy them.
We got the bags from Oriental Trading. They are the same material as resuable grocery bags and were super cheap. We love the bright colors and it allowed us to spend more on the contents.
Key Card Holder (idspecialists.com)
Flip Flop Gummies (orientaltrading.com)
Mini Frisbee (orientaltrading.com)
Personalized Margarita Mix Packets (sweetwrapture.com)
Underwater Camera (ecamerafilms.com)
Personalized Double-Walled Acrylic Cups (discountmugs.com) Had an issue with the printing on these (the 'n' in Ken looked more like an 'm'). They reprinted the order for us twice (no charge) and finally got it right. A little bit of a hassle, but very pleased with the end product.
Mexico Survial Kits (more pics in the next post)
Welcome Booklet - held together by a palm tree brad from Michael's