1 Oz Shot Glasses

shot glasses
A small glass used for serving liquor
(shot glass) a small glass adequate to hold a single swallow of whiskey
(Shot glass) Used for serving shots and layered cocktails. Cocktails in shot glasses are meant to be drunk quickly, in one gulp. The ideal option for busy and lively parties. Standard volume 40 to 60 ml.

oz
ounce: a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams
Oz (aka Oz - A Rock 'n' Roll Road Movie also released as 20th Century Oz in United States) is a 1976 Australian film written, directed and co-produced by Chris Lofven.
Australian
The ounce (abbreviated: oz, the old Italian word onza, now spelled oncia; apothecary symbol: ?) is a unit of mass with several definitions, the most commonly used of which are equal to approximately 28 grams.

1
one: the smallest whole number or a numeral representing this number; "he has the one but will need a two and three to go with it"; "they had lunch at one"
one: used of a single unit or thing; not two or more; "`ane' is Scottish"
"?1" (read "Infinity Ichi"; translated as "Infinity 1") is Do As Infinity's twenty-first single, released on June 17, 2009. The band had disbanded in September 2005, but reformed three years later in September 2008.