What's the noun for jiggers? Here's the word you're looking for.
jigger
(US) A double-ended vessel, generally of stainless steel or other metal, one end of which typically measures 1 1/2 fluid ounces, the other typically 1 fluid ounce.
(US) A measure of 1 1/2 fluid ounces of liquor.
(mining) The sieve used in sorting or separating ore.
(mining) One who jigs; a miner who sorts or cleans ore by the process of jigging.
(pottery) A horizontal lathe used in producing flatware.
(textiles) A device used in the dyeing of cloth.
A pendulum rolling machine for slicking or graining leather.
(Britain, slang, dated) A bicycle
(golf, dated) A wooden or metal headed golf club used to play low flying shots to the putting green from short distances.
(nautical) A light tackle, consisting of a double and single block and the fall, used for various purposes, as to increase the purchase on a topsail sheet in hauling it home; the watch tackle.