The double rocks glass exists for one reason: a large ice cube needs somewhere to sit. Once bars started cutting two-inch cubes for stirred drinks, the standard rocks glass became too tight — the cube filled it, the drink had nowhere to go, and there was no room to stir. The double is the same shape with the volume doubled.

What is a double rocks glass

A short, wide, heavy-bottomed tumbler holding roughly 10 to 14 ounces, around 300 to 400ml. It is also called a double old fashioned, a DOF, or sometimes a bucket glass. The standard rocks glass holds about 6 to 8 ounces; this is the larger sibling, not a different shape.

The defining features are a thick base, straight or gently tapered sides, and a wide mouth. The weight matters more than it sounds: a heavy base makes the glass stable when you are stirring or muddling in it, and it holds temperature better than thin glass.

A cocktail served in one is rarely 12 ounces of liquid. A spirit-forward drink is three or four ounces; the rest of the volume is ice and air. That generous headroom is the whole design.

When to use it

Three situations call for a double rather than a single rocks glass. A large ice cube or sphere — a two-inch cube is most of a single rocks glass before you pour anything. A drink with volume, like a tall tiki build or anything served over crushed ice with a float on top. A drink you build and stir in the glass, where you need room to move a bar spoon without slopping.

Chill it first for anything spirit-forward. Fill it with ice and water while you make the drink, then dump it — thick glass takes real cold well and holds it, which is the other advantage of the heavy base.

For a Tequila Old Fashioned, one large cube and three ounces of drink is the right proportion: the cube melts slowly, the drink stays cold without washing out, and the wide mouth lets the orange twist actually reach your nose. For tiki drinks like a Navy Grog or a Scorpion, the volume is for crushed ice and a long list of ingredients.

Do not over-fill it. A drink that reaches the rim cannot be picked up without spilling, and the empty top third is part of how the aroma works.

What to use instead

A standard rocks glass is the obvious fallback, with cubed ice rather than a single large cube. The drink will dilute faster because small ice has more surface area, so drink it sooner or stir it slightly less.

A highball works for the longer, crushed-ice drinks, though a tall narrow glass changes the experience of a tiki build — you lose the wide surface where the garnish sits. A tiki mug is the traditional and more fun choice for those.

A stemless wine glass is a surprisingly good emergency double rocks: similar volume, wide mouth, and it holds a big cube. Avoid anything thin-walled for a drink built on one large cube, since the whole point is thermal mass.

Drinks served in a double rocks glass

The Tequila Old Fashioned is the classic single-cube use. The Navy Grog and the Scorpion are the volume uses, both tiki drinks with crushed ice and several ingredients. Broadly, anything spirit-forward on a big rock and anything long over crushed ice belongs here. Every drink on the site served in a double rocks glass is listed below.

Questions

What size is a double rocks glass? About 10 to 14 ounces, roughly double a standard rocks glass.

Is it the same as a double old fashioned? Yes. Double rocks, double old fashioned, DOF and bucket glass all mean the same thing.

Do I need one? Only if you use large ice cubes or make tiki drinks. Otherwise a rocks glass covers most of it.

Why is the base so thick? Stability for stirring and muddling, and thermal mass so the glass stays cold.

How full should it be? Not very. Three or four ounces of drink plus ice, with the top third empty for aroma.