I agree that that the icy cold rips can be quite refreshing (although they seem to irritate the lungs in the long-run).
I also have a couple of alternatives for using snow (and a snow alternative for the snowless) without having to constantly dump the water (or replace the snow nearly as often).
Idea 1: You could get a large salad bowl or appropriately tall pan, and fill it with snow after placing the bong in the center. For example, the tube posted by the OP could be placed in the center of the bowl/pan and one could pack a mound of snow around it (just below the GonG joint is best IMO). It may need to occasionally be repacked to be flush against the glass, and snow may have to be added or water removed for a REALLY long session. One thing to be aware of, however, is that the water in the base of the tube can begin to freeze if left encased in snow, unused for too long (and down-stem can sometimes get clogged with clumps of whipped, water logged oil).
Idea 2: You could fill your water-piece with glass seed beads (
http://www.fuckcombustion.com/viewtopic.php?id=1751 ) , and place it in the freezer BEFORE filling it with water, or place it in the REFRIGERATOR after filling it with water and the beads. The tiny beads resemble snow in the way that they diffuse the vapor (and cool it when the beads are cold).
The second alternative is also an option for those who live in a climate that does not get snow (and don't happen to have their ice shaving tool/machine).
I am sure that the frog in my avatar, standing on the ice cliffs at sunset and blowing out a heart-shaped vapor cloud, would love these refreshing, icy-cold rips.