thunder mugs

What is a thunder mug?  They derive their name from their typical "Mug" shape.  Many had handles, but not all.  These have been used for centuries by black powder manufacturers for testing black powder formulas.  Since their creation, they have been adapted to several other uses, to include signaling devices, firework launchers and smoke stack cleaners, just to name a few.  Examples of early thunder mugs have been found in several countries.  They are made from cast iron or brass.  Most have a small lip at the bottom, just below a hole.  This is where a small amount of powder was placed so as to ignite the powder in the chamber.  Sizes vary, however typical mugs are from 5 to 12 inches tall.

Caution! As these face straight up, extreme care needs to be taken when lighting.  It should be done using a long fuse so that you can retreat a fair distance away.  Also, if one misfires, wait several minutes before approaching it.

Thunder mug examples