This is what I've been working on - a flowery tea cosy inspired by Jane Brocket's design that I admire greatly. I made my own version using cartridge-belt rib and worked out my own shaping to fit my fat yellow teapot. I got a bit carried away with the flowers. They take a bit of practice but Jane Brocket gives good instructions in her book.
Tea cosy from The gentle art of knitting by Jane Brocket
"Bouquet" tea cosy from Fontana gift and novelty book #61
I found this version in an old knitting booklet from the 1950s. It's more ornate but the same general idea. I'd love to see it in colour.