which is making with spring loaded tube and filled with glitters. this is because if someone suddenly opens this spring load it will blast the bombs so the person suddenly gets fear and nervous due to high noise. but before open this bomb the person does not know whether it’s real or filled with glitters. even this kind of annoying things makes the person to get serious problems due to sudden cause of fear and sound. let you use this kind of product for funny things and enjoying your crazy experience with your friends, neighbors or any other person. 