This pattern allows you to turn recycled glass jars of various sizes into travel mugs—or just carry hot beverages without burning your fingers. (Incidentally, the cozy also provides some protection when the glass jar falls onto hardwood from a height of several feet, don’t ask me how I know.)

The densely cabled fabric is a perfect insulator, and the texture helps you grip your drink securely. The all-over cables repeat seamlessly, and since the goal is to clothe random jars of all sizes, the pattern includes a formula for calculating stitchcounts to scale up and down to fit circumferences not already listed.