This set has 12 little teapot designs optimized for use with mylar. We used ours to make kitchen towels; these could also be used to make matching curtains. These all fit the 4x4 hoop and most sew out in under 10 minutes.
If you haven't used mylar yet, check the information here:
These also work very nicely with White Mylar if you want to use a print or darker background. Please check the link above for information on purchasing white mylar.