Striped Shells Glass Cozy - free pattern

I made this design a few years ago, for our livelihood project. Now we are going to make it again...so I made some samples and took pictures.
This is easy to make, and would fit several shapes and sizes of glasses since it could stretch a bit. The addition of a stripe makes it more attractive, but you can also skip the stripe and crochet continuously in one color.

Striped Shells Glass Cozy
copyright Mimi Alelis, 2012
(Please do not distribute my patterns in any manner or form.)
This pattern can only be found on this link:
http://mycottonthreads.blogspot.com/2012/03/striped-shells-glass-cozy-free-pattern.html

Materials
Cannon cotton thread, size 8 (can be substituted with size 10 thread), main color (MC), one ball, 50gm (note: one ball will make at least 4 glass cozies)
Cannon cotton thread, size 8 (can be substituted with size 10 thread), contrasting color (CC), (about 1/4 ball is enough to complete a set of 4 glass cozies)
Crochet hook size 1.5mm (use a bigger hook to make a bigger size glass cozy)
Yarn needle to weave in ends
Finished size: about 4 inches across top, measured flat

Glass Cozy
Note: Ch 3 at the beg of rnds counts as dc.
Start with ch 5, sl st in 1st ch to form a ring, 
Rnd 1: Ch 3, 14 dc in ring. Join with sl st to beginning ch 3. (15 dc)
Rnd 2: Ch 3, dc in same st, 2 dc in each dc around, join. (30 dc)
Rnd 3: Ch 4 (counts as dc and ch 1), dc in next dc st, (ch 1, dc in next dc) repeat around, join. (30 dc with ch 1 space in between)
Rnd 4: Sl st in next ch-1 space, ch 3, dc in same sp, 2 dc in each ch-1 sp around, join. (60 dc)
Rnd 5: Ch 3, dc in same st, ch 2, 2 dc in same st (shell made), [skip 3 dc, (2 dc, ch 2, 2 dc - shell) in next dc] repeat around, join. (15 shells)
Rnd 6: Sl st in ch-2 sp, ch 3, dc in same sp, ch 2, 2 dc in same sp, (2 dc, ch 2, 2 dc) in each ch-2 sp around, join. (15 shells)
Rnd 7: Repeat rnd 6, change to CC at the end of rnd.
Rnd 8: Repeat rnd 6, change to MC at the end of rnd.
Rnds 9-15: Repeat rnd 6, change to CC at the end of rnd 15.
Rnd 16: Ch 1, [(2 sc, ch 2, 2sc) in ch-2 sp, sc in space between shells] repeat around, join with sl st to 1st sc.
Fasten off and weave in ends.