No one likes to go to a party empty handed. A bottle of wine is usually appropriate, unless your host doesn’t drink alcohol. Flowers are great too. But, as I read once in an etiquette book, if you’re going to take flowers make sure they’re in a vase. It is difficult for the hostess to stop what she’s doing and find a vase, trim the flower stems, and fill the vase with water.
So, here’s another option. I found these flour sacks at a craft store, and they’re very inexpensive. I then embroidered the wheat design three times along the bottom of the towel. You can find the design in this book by Mary Norden..