Using 1.5" Dia. stainless steel shaft stock from a marine pump, I lathed out a Jigger/Pony Shot Glass, which is a bartender's measuring glass for shots. Jigger = 1.5oz, and Pony = 1.0 oz. I do not know what kind of steel it is, but I imagine it had to stand up to saltwater, so Im just going to assume its good enough. Its the only stainless steel we had laying around in the shop anyway.
The walls of the shot taper from ~1/32" to 1/16" to lessen the weight and give it a bit of depth. Also, 1/4" wide shallow groves were machined in it as well to make it look nicer. The concave cut in the middle gives your thumb somewhere to hold on to, and it drastically lowers the weight.
I apologize for the dirty paper, I used it while I was machining to make sure I took the correct cuts.
Step 1: Cutting and Drilling
-Obtain 4-6 inch section of 1.5" dia. stainless steel
-chuck the piece in a lathe, face one side to make it flat
-take an array of drill bits, starting around 1/4" up to 1-3/8", with increasing increments of 1/4".
-Drill out the cylinder with each drill bit, going up one step (this makes it easier on the bits and prevents the bit from possibly catching in too much metal and thus turning the piece within the chuck, BAD.
-Lathe speed should be between 100-215 rpm