I love my Klean Kanteen, but it can get slippery from the moisture formed when it's filled with cold drinks. I got the idea from someone in a yarn shop that had a cozy for her Klean Kanteen. I knitted up some nice merino and decided to make myself my own cozy. The design was my attempt at a Fibonacci Sequence. Not only does it keep my beverage colder longer. It keep the Kanteen from slipping out of my hand.