These have become a serious addiction. They are small (2½ inch / 6.5 cm long), spicy pork sausages from Guizhou province in China, made by the Tujia ethic minority. Each package contains two of the sausages. The packages are colour coded.
The orange ones are the least spicy - merely incendiary. The red are hotter - nuclear. And the purple are thermonuclear. I always eat three packs in ascending order of spice. Beer is required.
I buy these in lots of 100 packages of each at a time.