Water
Water is in every cocktail, either poured from a measure or melted off the ice. A hard 12-second shake gives around 20% dilution by Difford's Guide's measurement, and stirring gives less, so dilution is part of every recipe whether or not the line lists it. Poured water is the base of a toddy, the length of a Mizuwari and the dash that dissolves an Old Fashioned's sugar.
Quick Facts
Tap or filtered water, fresh. For cold drinks we keep a jug in the fridge; for hot drinks boil fresh water and let it stand about 30 seconds before pouring.
None of the 14 listed allergens.
About Water
Flavour Profile
Primary Flavours
Tasting Notes
Clean and neutral when properly sourced. Contributes mouthfeel and balance rather than flavour.
Most of the water in a drink comes off the ice
Because ice cools a drink by melting, every shaken or stirred drink takes on water as it cools. Dave Arnold, writing on Cooking Issues in 2010, found that shaking chills and dilutes a drink in around 15 seconds, and that stirring can take over two minutes to do the same. Our house times follow from that: shake hard for 10 to 12 seconds, stir for 20 to 30, or 15 to 20 over one large cube in the glass.
How water reaches a drink
Shaken hard, 10 to 12 seconds
- Where the water comes from
- Melting ice in the shaker
- How much
- Around 20% of the drink (Difford's Guide)
- Our example
- Any sour or daiquiri
Stirred, 20 to 30 seconds
- Where the water comes from
- Melting ice in the mixing glass
- How much
- Less than a shake (Arnold)
- Our example
- Any stirred drink
Built over ice
- Where the water comes from
- Slow melt in the glass
- How much
- Grows as the drink sits
- Our example
- Highballs and the Old Fashioned
Poured cold
- Where the water comes from
- The measure
- How much
- 90ml to 45ml of whisky
- Our example
- Mizuwari
Poured hot
- Where the water comes from
- The kettle, just off the boil
- How much
- 120ml to 60ml of Scotch
- Our example
- Hot Toddy
Dashed onto sugar
- Where the water comes from
- The measure
- How much
- A few dashes
- Our example
- Old Fashioned
| Method | Where the water comes from | How much | Our example |
|---|---|---|---|
| Shaken hard, 10 to 12 seconds | Melting ice in the shaker | Around 20% of the drink (Difford's Guide) | Any sour or daiquiri |
| Stirred, 20 to 30 seconds | Melting ice in the mixing glass | Less than a shake (Arnold) | Any stirred drink |
| Built over ice | Slow melt in the glass | Grows as the drink sits | Highballs and the Old Fashioned |
| Poured cold | The measure | 90ml to 45ml of whisky | Mizuwari |
| Poured hot | The kettle, just off the boil | 120ml to 60ml of Scotch | Hot Toddy |
| Dashed onto sugar | The measure | A few dashes | Old Fashioned |
Hot drinks take water just off the boil
Boil the kettle, then let it stand about 30 seconds. The Hot Toddy takes 120ml to 60ml of Scotch, and the Hot Buttered Rum 150ml poured over the batter and rum. Water at a full boil knocks the aroma out of the spirit and leaves the drink scalding, and a hot drink is never boiled once the spirit is in. Warm the mug with hot water first and tip it out.
Poured cold, it changes a spirit's smell
The Mizuwari is two parts still water to one of whisky over clear ice, so the water has to taste of nothing: filtered, or bottled and low in minerals. At the other end of the scale, the Old Fashioned uses a few dashes only, to start its sugar cube dissolving before the bourbon goes in. Between them sits the drop of water in a glass of whisky, which 2017 modelling of guaiacol by chemists at Linnaeus University suggests pushes smoky aroma towards the surface as the strength falls.
Batched drinks need their water measured in
A stirred drink batched into a bottle and poured from the freezer never meets melting ice, so the water it would have picked up goes in by measure before chilling. Without it the drink is short, strong and hot on the tongue. Drinks poured over cubed ice still dilute in the glass, so they need less added.
Using Water
Usage
Measured like any ingredient where a recipe lists it: a few dashes to dissolve sugar, 90ml cold and still in a Mizuwari, 120 to 150ml just off the boil in a toddy or hot buttered rum. Everywhere else it arrives from the ice, controlled by time and technique.
Pro Tip
If a stirred drink tastes hot and sharp, it is under-diluted, not under-sweetened. Stir another ten seconds and taste again before reaching for syrup.
Top Tips
- Boil the kettle and leave it about 30 seconds before pouring into a hot drink. Water at a rolling boil scalds the aroma.
- Use soft or filtered water in drinks where it is most of the glass, such as a Mizuwari. Chlorine and hardness show.
- Warm a mug with hot water and empty it before building a hot drink. A cold mug takes the heat straight out.
- Add water to whisky a few drops at a time and smell it between each. Too much flattens it.
Possible Substitutions
- Weak Black Tea: in hot punches and grogs: adds tannin and body
- Sparkling Water: only where fizz is wanted; never in a hot drink
Production Method
Drinking water from the mains or a bottle. For drinks where it is most of the glass, soft or filtered water keeps chlorine and hardness out of the taste.
History & Context
The Oxford Companion says the first unambiguous appearance in print of the cocktail’s formula and name together is in Hudson, New York, in 1806, when a local newspaper defined Cock-Tail as “a stimulating liquor, composed of spirits of any kind, sugar, water, and bitters”. Pascal Tréguer’s Word Histories, quoting the paper, names it The Balance, and Columbian Repository and dates the definition to 13 May 1806.
More to explore
Common Questions
How much water ends up in a cocktail?
Why does a cocktail need dilution?
Why add water to whisky?
How hot should water be for a hot toddy?
Does the water I use matter?
Do batched cocktails need water added?
Sources.
Checked between 17 October and 19 October 2026.
- The Oxford Companion to Spirits and Cocktails (David Wondrich), “Cock-Tail” (secondary source: the first unambiguous appearance in print of the formula and name together, Hudson, New York, 1806: “a stimulating liquor, composed of spirits of any kind, sugar, water, and bitters”).
- Cooking Issues, “Cocktail science in general, part 1 of 2 (Dave Arnold, 2010)”.
- Scientific Reports, “Dilution of whisky: the molecular perspective (Karlsson and Friedman, 2017)”.
- Word Histories (Pascal Tréguer), “1806: earliest definition of ‘cocktail’ (mixed drink with a spirit base)” (named-author etymology site quoting the newspaper: The Balance, and Columbian Repository (Hudson, New York), 13 May 1806: “a stimulating liquor, composed of spirits of any kind, sugar, water, and bitters”, “vulgarly called bittered sling”).
Made with Water
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Updated 19 October 2026