Been to Thailand and have the fabric. Like others have said a batik would be great. Love the idea of a mug rug too. Or a small wallhanging. Go to
www.thaifoodandtravel.com and scroll down to the bottom of the home page where it says photo page. Go there and down at the bottom is a category of photos for Thailand fabric.
Many of the other photos may give you inspiration. Lots of snorkling and jungle pictures that you might interpret in your project.