In glass blowers, sugar cane refers to colored glass rods; These stems can be simple, contain one color, or they can be complex and contain strands of one or more colors in the pattern.
Cane work refers to the process of making sugarcane, and also using pieces of sugarcane, throughout, the blowing process to add intricate, often spiral, patterns and lines to boats or other glass objects. You can browse various sources online and find more about murrini glass.
Cane is also used to make muffins (singular 'murrine, sometimes called glass mosaic), thin disks cut from sugar cane into cross-sections that are also added to objects that are blown or worked with heat.
A special form of murrine glass is the millefiori ("thousand flowers"), in which many murrines with cross-sections in the shape of a flower or star are inserted into pieces of blown glass.
There are several methods of making sugar cane. In each case, the basic technique is the same: a piece of glass, often containing various patterns of transparent and colored glass, is heated in a furnace (glory hole) and then removed, using a long metal rod ( punty) attached at each end.
When the glass is stretched, it maintains any cross-sectional pattern in the original bulge but tapers fairly evenly throughout (due to the skill of the glazing it works interestingly, aided by the fact that if the glass becomes narrower at some point makes it colder there and thus it becomes stiffer).
Usually, the stick is pulled down to about the diameter of a pencil, depending on the size of the original bundle, it can vary in length from one to fifteen feet.