A cat carrier is a small box or cage designed to safely transport cats. It's like a portable house for your cat when you need to take them somewhere, like the vet or on a trip. Full definition
Some cats make such a fuss about being in cat carriers that their parents let them roam freely in the car while traveling to the veterinarian. (cattime.com)
How to choose the best cat carrier for your cat. (myhealthycat.com)
Here's a video showing the steps in the process of cat carrier training. (preventivevet.com)