Pillow cases work great! That is how I take mine to the vet. Like mentioned, a box is one possibility. But I worry about germs in boxes. Imagine what baoxes come in contact with when transported or being stored in warehouses? I prefer using a mop bucket or pail with a handle. It is easier to carry.

If using a mop bucket, make sure it is cleaned out and completely. I bleach my bucket out, rinse it good, then towel dry it and leave it out in the sun to air dry. Then I line the bucket with a large bath or beach towel for warmth and support. Then just lay the pillow case with your snake in it, in the bucket.

fyi, Teej