I think I’ve perfected the milk bottle cozy. In the manner of all the cool knitters, I shall name the design: Elsie.
The last cozy was really just a long hat (based on Crazy Aunt Purl’s Easy Roll-Brim Hat) and the open part flopped all over because milk jars are not head shaped. I tried to market this as though it was an intentional bit of flair, but not even the cows believed it.
Elsie is different. She starts out narrower, widens for the main jar part, and then narrows again, coming to a close on the bottom. This slight shaping provides the perfect cling to highlight the natural curves of any 1/2 gallon mason jar.