I'm also a ceramic yarn bowl fan - mine is from The Loopy Ewe, an online shop. I also have a wonderful wooden piece that holds center pulls cakes and spins when pulled. This works beautifully and is a good looking piece. At from TLE. I'd love a wooden yarn bowl a little deeper than mine is, with both the open-ended place to feed yarn and the enclosed hole. I also like Chia's one skein piece - it's pretty and keeps the yarn clean while on the go. I used plastic bags for years and finally decided I wanted something prettier, so over the years I've added a few pieces that I also enjoy looking at.
Carol Knitting is cheaper than therapy and more effective. I enjoy it more and it's good for my blood pressure. What more could you want?
I use my pottery yarn bowl at home but for knitting in the car I use a ziplock bag now (thanks for the idea!!). Keeps the yarn clean as it's still snowing here and the floor mats are usually wet and muddy.