I agree. I've used the hand warmers on many occasions. It's all about how much room is in the box, how close the hand warmer is to the snake, and of course, making sure there isn't TOO MUCH heat. If he had only used one, everything probably would have been ok. Just have to think ahead, that's the most important factor in avoiding a catastrophic shipping event. Sucks that it didn't make it. No matter how many times I ship, I worry EVERY time.