We're supposed to be keeping an eye on how much we drink, but how many of us really know what a unit of alcohol is? The thimble measure is a stainless steel vessel, like a shot glass, either with predefined measuring lines etched or stamped into the sides, or else pre-sized so that pouring up to the brim of the measure yields the correct volume. This second variation is commonly seen in a double-thimble or "hourglass" form, with two metal cups of different volumes (often in a 3:2 or 2:1 ratio, like a U.S. standard 1.5 fl oz "jigger" and 1 fl oz "pony", or UK standard 25/50mL or 35/70mL combos) spot-welded to each other at their relative bottom surfaces, possibly with a handle between them, allowing one unit to easily measure two common volumes. A centiliter is larger than a milliliter. Simply put, cl is larger than ml. In fact, a centiliter is "10 to the power of 1" larger than a milliliter.

Alcoholic spirits measures are instruments designed to measure exact amounts or shots of alcoholic spirits. This means that within an hour there should be, in theory, little or no alcohol left in the blood of an adult, although this will vary from person to person.ABV is a measure of the amount of pure alcohol as a percentage of the total volume of liquid in a drink. Common in France, where it is called a bouchon doseur boule, this device consists of a transparent T-shaped glass tube arrangement, [4] with a ball on one end of the horizontal section, a cap or cork on the other end, and a cork or plastic bottle stopper on the bottom of the T, allowing the measure to replace the cap of a liquor bottle. In use, the bottle is inverted until the ball fills with liquor, and then tilted in the other direction to let the liquor pour out the spout in a manner that keeps additional liquor entering the measure from the bottle. Thimble measures are also used in 175ml and 250ml volumes for measuring wine. Although government stamped for the correct volume, the thimble measure does rely on the user measuring the wine out manually into the thimble. With so many different drinks and glass sizes, from shots to pints – not to mention bottles – it's easy to get confused about how many units are in your drink. First, note that cl is the same as centiliters and ml is the same as milliliters. Thus, when you are asking to convert 70 cl to ml, you are asking to

One unit equals 10ml or 8g of pure alcohol, which is around the amount of alcohol the average adult can process in an hour. You can work out how many units there are in any drink by multiplying the total volume of a drink (in ml) by its ABV (measured as a percentage) and dividing the result by 1,000. Using units is a simpler way of representing a drink's alcohol content – usually expressed by the standard measure alcohol by volume (ABV).

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units is equivalent to 6 pints of average-strength beer or 10 small glasses of lower-strength wine. Calculating units For example, a pint of strong lager contains 3 units of alcohol, whereas the same volume of lower-strength lager has just over 2 units. The Weights and Measures Act of 1963 made it illegal in Britain for businesses to give short weights or short measures to consumers. Before this there was no legislation, only guidelines as to the correct weight of an alcoholic spirit measure, and if spirit measures or optics were used, they required a government stamp to certify that the measure was accurate. This act specified that only gin, rum, vodka and whisky were spirits and had to be served in the prescribed measured quantities using an approved optic measure. All other drinks are not spirits (for the purposes of the act) and could be free poured. Today, these other drinks may not be free poured, but must be measured, though the bar is free to choose the size of the measure (which must be advertised). In practice, most bars will use the same size measure as for the four spirits. [5] Since a centiliter is 10