This is a great idea for your aches and pains and keeping green not only with the bottle cozy, but by not using and electric heating pad. This tutorial comes from Re-sweater and I love the blog and if you have no place to pickup sweaters Kris sell them on ArtFire.
Artist statement: Hi! My name is Kris. I love recycled wool, and all the fabulous things that can be made with it. I sell wool sweaters for repurposing in a shop on Artfire. New to recycled wool? Type “FAQ” in the search box, and don’t hesitate to ask any questions you may have!
Though I blogged about it, the tutorial originally comes from the New New blog:
http://thenewnew.blogspot.com/2009/01/make-your-own-hot-water-bottle-cozy.html
Just wanted to make sure the credit goes to where it is deserved!
Thanks for the mention though! I do, however, have many recycled sweater tutorials on my blog that are my original tutorials, like a dog sweater, purse pack tissue holders, and Easter baskets.