With some, there are infinite possibilities. Most have a hole in the top so you can check the baby and access the carrier handle. You can use these as a high chair cover to catch flying food, as a stroller cover to protect the baby from the weather and prying eyes, as a cover in a shopping cart to keep germs off the baby, or drape loosely over the baby so that you can nurse him with some privacy.
You can even use it to change the baby in an inopportune spot. You can also use these canopies as clothing for yourself: a scarf, a skirt, a blouse, a belt, a head scarf to wear in lousy weather, or anything else you can dream up.