FYI, you can get a very similar effect using 1/4" OD polyethylene tubing that is sold as ice maker water supply line. You can buy the tubing at most any hardware store, Home Depot etc. It's very cheap at about $3 for a 25 ft coil. The tubing is semi-rigid which makes it easy to install and also easy to remove for cleaning purposes. Slip it into the dip tube and trim the ends flush with a sharp utility knife. Works like a champ.