Sugar glass, which is also known as candy glass or breakaway glass, is made up of corn syrup, water, and of course, sugar.
It is used in stunt scenes instead of glass to prevent harming the actors. Though it is not as dangerous as real glass, it still has the potential for injury. A notable example of sugar glass is in Raindance alumni, Edgar Wright’s film Shaun of the Dead when the zombies break through the windows of a pub to attack the humans.
In order to use this special affect you’ll need to gather up an old saucepan, an oven, thermometer, and a mold for your glass. These tools in addition to the ingredients of water, corn syrup, and sugar will have you on your way to smashing bottles or jumping through glass windows in no time.
To make colored glass add food coloring. If you desire a brown bottle add brown sugar. If you want a clear glass look add liquid syrup instead of golden syrup.
After a sugar glass sheet or tumbler is made it must be used in a timely manner. If not, it will become soft, sticky, and the shape will warp.
For a step by step guide to make sugar glass to go here: