These custom machined shot glasses a/k/a "Whiskey Slingers" are created from a 2" solid round billet,  6AL4V (Grade 5) TITANIUM or 6061-T6 ALUMINUM stock. The shot glasses go through several processes individually including the engraving of Nottingham Tactical on the bottom of each one. The size and weight of these shot glasses make them very satisfying to drink from and hold! Measure your shot by the 1oz, 1.5oz (standard shot) and 2oz measurement lines machined into the interior of each shot glass.