Good trick, excellent instructions but gives no information where to obtain the key ingredient.
Having bought several of this type of gimmick in the past and having been disappointed, the correct
size & type is key and this lack of information makes this trick a no go for me I'm afraid.
I do agree that the things needed to make the gimmick could be explained a little better in the instructional download, BUT they are commonly available and easy to find. Walmart carries the things needed, though under a different name which is what people are getting confused about I think. Sizing is a thing to consider, though finding the proper materials doesn't take much effort, and in a way also comes down to your performance style and handling in my opinion. Finding what works best for you is part of the fun and adventure when learning and performing magic!