They sell moss in a brick similar to the Eco Earth thing as well, or at least they used to and it's cost efficient because of how much you get for the price. You can use the moss for a humid hide, but be careful how humid, and I'd check on the moss often because dampness tends to make a snake defecate, especially if it's warm. If you see anything on it, throw it away, and you can soak the moss in hot water to kill bacteria and that gives you a reason to switch out with fresh moss, and you can do that back and forth for a few times.