How about for your next Hawaiian Christmas party, you make this set up flip flop Christmas tree?
Kelly's Crafts Flip Flop Ready to Paint Suncatcher | Shop Hobby Lobby
Flip Flop Wreath Tutorial
Flip flop art
Flip Flop wood door hanger by NancysDoorDecor on Etsy, $38.00
Since I don't live anywhere near the beach, these would be more useful as snow boots.
A personal favorite from my Etsy shop https://www.etsy.com/listing/291803557/summery-flip-flop-welcome-sign
Hand Painted Decorative Glasses Personalized Wine Glass Bick Lane
Flip flop quilt pattern available at Woo Hoo! http://www.patchabilities.com/shop/Patterns/Spring-and-Summer-Seasons/p/MM506-Flip-Flop-Splash-x6782026.htm
Coastal Canvas Art with Words to Celebrate Summer! http://www.completely-coastal.com/2015/06/coastal-canvas-art-with-words-to.html