Over the next couple thrift store visits, I found a perfect little white crock for a couple dollars. It had no markings and clean lines.
Back at home, I searched online for an image I liked and saved it to my computer. From one of my favorite fellow bloggers, Just Something I Made, I'd already learned about inkjet waterslide decal paper. I LOVE it! You can make so many cool things without having a pricey machine, just using your printer. Cathe from JSIM recommends getting the decal paper from here so I did and was happy with my order but I've since seen it on Amazon too. Maybe you can even find it locally?