The first tea cozy is knitted out of Noro Kureyon, 100% wool. I love the colors of Kureyon but don't like to make anything that touches the skin because it's so scratchy, therefore, a tea cozy was the perfect use for this yarn. It felts wonderfully but I was too lazy to make this one felted. It fits my Old Amsterdam 6 cup teapot perfectly.
The second one is crocheted out of an acrylic yarn from Hobby Lobby called I Love This Yarn! It is so soft and a pleasure to work with, unlike Red Heart. It fits my 3 cup pot.
Lastly, is a crocheted cozy based on one I saw here. I must admit that I didn't follow her instructions, just the concept. I watched videos on YouTube and had a demonstration of the stitch by Marta from my knitting group, Las Vegas Knitters. I kinda worked it up as I went along. The colors weren't planned but I just grabbed what yarn I had handy at the time. You see? I am a lazy crafter!