And as promised, a pattern (of sorts)
I used Sugar 'n' Cream cotton, knitting in the round on two 24 inch size US5 (3.75 mm) needles. But the pattern is adaptable to your preferred yarn and needles.
- Cast on 8 stitches. Join and knit one round.
- (YO, K1) around
- (YO, K2) around
- (YO, K3) around
Knit plain for 8 rounds or so (about an inch, or as long as looks good to you).
The "body" of the bottle cozy can be any stitch pattern you want. I've been experimenting with lacy stitches. Above, I used:
- (YO, K2tog) around
- (K2tog, YO) around
End with an inch or so of ribbing and bind off loosely.