Bias Cup Cozy

I've been playing with ideas for cup cozies. I wanted something heavy enough to protect fingers from a hot drink and sturdy enough to stand up so it's easier to get the cup in. Here is my result. I really like it in variegated yarns.

Directions for Bias Cup Cozy

size G crochet hook
worsted weight acrylic yarn (doesn't take much)
Crochet in the back loop through out to create the ridge.
Row 1:
Chain 12 Work 2 single crochet in second chain from hook, then crochet one single crochet in each chain across
to last 2 chains. Crochet the last 2 chains together. Chain 1 and turn. (11 stitches)
Row 2:
Single crochet the first 2 stitches together, then crochet one single crochet in each stitch across to the last stitch. Work 2 single crochet in the last stitch. Chain 1 and turn. (11 stitches)
Row 3:
Work 2 single crochet in the first stitch, then crochet one single crochet in each stitch across to the last 2 stitches. Single crochet the last 2 stitches together . Chain 1 and turn (11 stitches).
Repeat rows 2 &3 for a total of 21 rows. Slipstitch the ends together.
Single crochet around the top, doing a pattern of 1 sc in two rows, then 2 sc in third row. Do a second row with 1 sc in each sc. Join, cut yarn, and weave in end. Do the same on the bottom of the cozy.