If you are refering to the dispensing unit that is used in the neck of upside-down spirit bottles, as commonly seen in pubs, the name is 'Optic'
Alcohol premixed spirits in a can has only up to 5.5-7.5% ABV whilst a bottle of unmixed spirits is definitely above 20% ABV.
cup,bottle,jug,mug and measuring cylinder
On average, a 70cl bottle of spirits typically weighs around 1.5 to 1.7 kilograms (3.3 to 3.7 pounds), including the glass bottle, cork or cap, and the liquid inside.
A 1.5-liter bottle contains 1500 milliliters. To find out how many 25ml drinks can be poured from this bottle, divide 1500ml by 25ml. This calculation yields 60 drinks. Therefore, you can get 60 servings of 25ml from a 1.5-liter bottle of spirits.
Is obvious that if it is mixed, is not just the alcohol in it, it may have juice or low % liquor. I think a bottle by itself has more alcohol than mixed can.
A label on a bottle bought in a shop would show the volume. If there is no label, fill the bottle with water to the top, then empty the water into a measuring jar or cylinder. The volume is then read off the scale marked on the measuring jar or cylinder.
You can pour wine into back into a bottle, but no one had succeeded in reincarnating a spirit.
Which is the question ?
liquid. As in: this bottle contains 600 millilitres.
"The volume of air in the diver decreases."
for the purpose of measuring the specific gravity
Spirits are typically measured in fluid ounces, milliliters, or centiliters. The most common sizes for spirits are typically a standard serving size (1.5 ounces or 44 milliliters) or a standard bottle size (750 milliliters).