The Blackbird Iced Coffee Cozy includes instructions to make the cozy with an open or closed bottom. The pattern includes instructions for 2 sizes - Grande and Venti.

YARN: Worsted weight acrylic yarn (you can use cotton if you prefer), less than an ounce
HOOK: US I/5.5 mm

Size : 2 sizes - Grande - 4 1/4 inches tall (10.8 cm) / Venti - 5 3/4 inches tall (14.6 cm)
Skill Level : beginner crocheter (half double crochet)

Special Stitches
* hdcX - half double crochet X-stitch :
skip a stitch and place a hdc in next stitch;
crossing over the front of this stitch (in
this case, the front is closest to you), hdc
into the skipped stitch.