To add a wintry look to end-of-the-year gatherings, Ice Bulb offers decorative curtains made of frozen water. A machine cuts ice into gemlike cubes, which the company hand-strings onto cables suspended from trussing. Curtains can be made in any length and height. If used indoors, the pieces last about five hours; a container below collects drips. Ice Bulb is based in Southern California, but works nationwide and in Canada. While pricing depends on the size of each piece, strands typically cost $140 to $180 each, plus more for assembly and delivery.