This colorful cozy is crocheted using a zigzag (ripple stitch) pattern. It is available in two different sizes to adjust for the size of the teapot that you have. This same designer also offers a variation of this tea cozy called the flower tea cozy that turns the basic design into a beautiful flower opening up around the teapot.
Ripple Crochet Tea Cozy from Justjen-knitsandstitches