How many ml is a glass of cocktail?

A cocktail glass holds between 150-180 ml of liquid on average. The exact amount can vary slightly depending on the size and shape of the glass. A standard cocktail glass that is used to serve martinis and other mixed drinks is usually around 170 ml.

Some key facts about cocktail glass sizes:

  • Small cocktail glasses hold about 150 ml.
  • Standard martini glasses hold around 170 ml.
  • Large cocktail glasses may hold up to 180 ml.
  • Cocktail glasses are smaller than a traditional wine glass.
  • The cocktail glass size can impact the drinking experience.

So in summary, a typical cocktail glass holds between 150-180 ml, with 170 ml being the average size that is used for martinis and other common cocktails. The exact amount can vary based on the specific glass being used.

Typical cocktail glass sizes

There are a few common sizes of cocktail glasses that each hold different amounts of liquid:

Small cocktail glass

A small cocktail glass generally holds around 150 ml of liquid. These glasses are dainty with a petite bowl and stem. They are typically used for serving straight spirits on the rocks or small cocktail portions.

Some examples of cocktails commonly served in 150 ml glasses include:

  • Whiskey on the rocks
  • Martini
  • Manhattan
  • Cosmopolitan
  • Daiquiri

The small size allows you to control portions for drinks with higher alcohol contents without overserving. The 150 ml capacity is perfect for taste testing complex cocktails without having to commit to a full-size drink.

Standard cocktail glass

A standard cocktail glass has a capacity of around 170 ml and is the most common size used for cocktails. This mid-range glass has a wide bowl tapering into a stem and is used for martinis, gimlets, and other mixed drinks.

The 170 ml standard cocktail glass is ideal for balancing taste with portion control. It provides enough liquid to fully experience the flavors of a crafted cocktail recipe without providing a supersized drink.

Some examples of cocktails commonly served in a 170 ml standard cocktail glass include:

  • Dry martini
  • Vodka martini
  • Negroni
  • Margarita
  • Old fashioned
  • Moscow mule

This is considered the classic cocktail glass size that has been used for generations of mixology. The 170 ml standard cocktail glass is versatile enough for neat pours of liquor or mixed drinks.

Large cocktail glass

A large cocktail glass holds around 180 ml and provides a generous serving for cocktails. These glasses have an oversized wide bowl tapering down to a delicate stem.

Large cocktail glasses are sometimes used for:

  • Tropical cocktails containing juice
  • Frothy drinks like piña coladas
  • Layered shooters
  • Bloody Marys garnished with pickles and bacon

The 180 ml capacity allows you to load up fruity tropical drinks with plenty of crushed ice, juices, and garnishes. The extra volume also accommodates whipped drinks that incorporate egg whites or cream.

Some examples of cocktails served in 180 ml large cocktail glasses include:

  • Long Island Iced Tea
  • Mai Tai
  • Mojito
  • Bloody Mary
  • Piña colada

The oversized bowl provides ample room for rum-based Tiki cocktails filled with chunks of fruit and juices or tall layered shooters. This glass size also easily accommodates bloody Mary garnishes.

How glass size impacts the drinking experience

The size of a cocktail glass significantly affects the drinking experience:


Cocktail glasses are designed to highlight the visual aesthetic of a mixed drink. The shape concentrates colors and gradients within a smaller volume for impact. A properly portioned cocktail should fill around 2/3 of the glass to display layered liqueurs, fruit garnishes, mint sprigs, or skewers.

Too small of a glass appears skimpy and insignificant. But an oversized glass spreading the cocktail too thin looks ill-proportioned. The right sized glass showcases a drink’s beautiful complexity.


The shape of a cocktail glass concentrates aromas for you to enjoy before your first sip. The tapered rim captures,contain, and focuses scents into a smaller opening.

But glasses that are too small limit available surface area for aroma release. And oversized glasses allow smells to dissipate too quickly. The ideal size holds aromas in a sweet spot for you to appreciate a drink’s fragrance.


Proper cocktail glass sizing allows for ideal dilution as you sip. The right amount of liquid means components maintain proper ratios so flavors are balanced.

Too little liquid makes drinks taste strong and concentrated. While oversized portions overdilute a cocktail, throwing off flavor profiles. With a well-sized glass, each taste highlights nuances a bartender meticulously balanced.


The texture of a cocktail interacts with your palate during sipping. A well-sized glass coats the mouth properly and accentuates viscosity.

Insufficient liquid fails to adequately coat the mouth with each sip. But too much liquid overloads the palate. When a cocktail glass is sized just right, it enables you to experience the drink’s full mouthfeel.


Drinking temperature impacts how cocktails taste. The ideal glass size chills a drink without allowing it to get unpleasantly cold.

Undersized glasses warm up quickly in your hand. But oversized glasses take longer to cool down and may dilute. With the right cocktail glass size, sipping brings out refreshing chilled flavors.

Portion Control

A cocktail glass size impacts how much someone consumes. A smaller glass contains portion sizes, especially for strong high proof spirits. But large glasses can promote overconsumption.

Moderately sized standard cocktail glasses allow you to enjoy one or two drinks responsibly. This prevents overserving yourself or others.

Factors affecting cocktail glass size

Many variables influence cocktail glass sizes including:

Type of Liquor

The alcohol proof and intensity impact ideal cocktail glass size. Lower proof liquors can handle larger glasses, while high proof liquors require smaller sizes.

For example, a Long Island Iced Tea can utilize a 180 ml glass because it dilutes 80 proof vodka with fruit juices and cola. But an Old Fashioned pairs best with a 150 ml glass due to its high proof bourbon.

Preparation Method

Cocktails with minimal mixing like martinis or spirits on the rocks need less volume. But drinks with fruit, juices, frothing, or layering demand larger glasses.

A 150 ml glass suits a dry vodka martini that simply mixes vodka with vermouth. But a blended piña colada requires a 180 ml glass.

Glass Thickness

Thicker, sturdier cocktail glasses retain chill better than thin stemware. So thinner glasses for drinks served straight up may need slightly smaller portions to prevent undesirable warming.

A warm Martini rapidly loses its fine flavor nuances. So a 150 ml thin glass keeps it properly chilled instead of a 170 ml glass.

Glass Shape

The bowl shape impacts capacity. Wide or rounded bowls hold more than narrow tapered bowls of the same height. Measurements should account for these differences.

A 150 ml tapered bowl glass may hold less liquid than a 150 ml wide bowl glass. The tapered shape gives the illusion of a larger portion.

Balanced Experience

Ultimately, the glass size should balance the drink’s visual appeal, aromas, flavor profile, texture, and temperature for ideal enjoyment. When factors align, the cocktail shines as the bartender intended.

Standard cocktail glass sizes

Here is a summary of standard cocktail glass sizes:

Small Cocktail Glass

  • Size: Around 150 ml
  • Best Use: Straight spirits or small cocktail portions

Standard Cocktail Glass

  • Size: Approximately 170 ml
  • Best Use: Most common size for cocktails like martinis

Large Cocktail Glass

  • Size: About 180 ml
  • Best Use: Tropical drinks, frothy cocktails, bloody marys

How to measure cocktail glass size

To determine the size of a cocktail glass, follow these simple steps:

Materials needed

  • Cocktail glass
  • Measuring cup
  • Water


  1. Fill measuring cup with water
  2. Slowly pour water into cocktail glass until full
  3. Take note of water amount used
  4. Empty water from glass
  5. Repeat process 2-3 times for accuracy
  6. Determine average amount of water used

This provides the approximate capacity of the cocktail glass in milliliters or ounces.

For example, if it takes an average of 170 ml of water to fill the glass, then it is a standard 170 ml cocktail glass size.

Measuring capacity helps determine the right cocktail recipes to make in that particular glass. It also assists with portion control when serving.

Tips for buying properly sized cocktail glasses

Here are some tips when shopping for properly sized cocktail glasses:

  • Inspect dimensions and capacity listed for the glass.
  • Check if it’s labeled as a small, standard, or large glass.
  • Recognize what cocktails you plan to serve in it.
  • Understand how design impacts capacity.
  • Buy a set rather than individual glasses for consistency.
  • Reference reputable glassware buying guides.
  • Avoid overly decorative or trendy shapes.
  • Stick to quality glassware from reputable brands.

Investing in a set of standard 170 ml cocktail glasses provides versatility to make all kinds of drinks. Then supplement with specialty sized glasses as needed.

Proper glassware helps serve and enjoy cocktails as intended when crafted by mixologists. With the right glass, you unleash the full experience of superbly balanced flavors, aromas, and visual delight.


How many ounces is a cocktail glass?

A standard cocktail glass holds around 5-6 ounces. A typical glass with a 170 ml capacity holds approximately 6 ounces of liquid. 1 ounce equals 30 ml.

Why are cocktail glasses so small?

The small size stemmed from Prohibition. Without large glassware, it was easier to conceal illegal cocktails. The portions also prevent overconsumption of hard liquors.

What cocktails traditionally use small glasses?

Small 150 ml cocktail glasses are traditionally used for spirits-forward cocktails like martinis, Manhattans, and Old Fashioneds.

What cocktails call for a larger glass?

Frothy, fruity cocktails like Piña Coladas and Mai Tais call for larger 180 ml glasses. Bloody Marys also utilize oversized glasses for garnishes.

How much bigger is a large cocktail glass?

A large cocktail glass holds about 30 ml more than a standard size. So approximately 180 ml compared to 150 ml for a standard glass.

The Bottom Line

A typical cocktail glass holds between 150-180 ml of liquid. The most common standard size is 170 ml which is ideal for balancing taste with proper portion control for most cocktails. Glass size significantly impacts the visual appeal, aroma, flavor, mouthfeel and temperature of a cocktail. Consider factors like the type of liquor, preparation method and glass shape when choosing the right cocktail glass size. With the proper glass, you can best experience a cocktail as the bartender intended.

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