Pipe Cleaners are thin, flexible wires covered in soft, absorbent material. Just gently insert the thin end into the pipes stem, twisting and pushing it though to clear away any buildup inside. The absorbent fibers on the cleaner scrub away residue, while the wire allows it to bend and reach curved areas of the pipe. After passing the pipe cleaner through a few times, it absorbs the moisture and clears out the debris, ensuring that the pipe is clean and ready for future use without clogging or affecting the taste. This can be combined with a pipe cleaning fluid for exceptionally heavy buildup.