"This carrier is definitely very useful! I have a couple hamsters and this is perfect for traveling with them. I have the medium sized version and a medium sized traveling cage, i just fill the cage with bedding, food, water, and the hamsters...slide it in the carrier, zip it up, and i'm all set to go! Everyone's safely fastened...including the bedding, which means it won't fly out during turns or when the girls start burrowing and kick the bedding around everywhere...which keeps the car clean =)"