Reserve 27, for example, for dropping in the drink?

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ Cooking such small amounts of food can be fiddly and time consuming so try freezing baby-sized portions in ice cube trays. ▪ I improvised by putting colour into an ice cube tray - thus giving me deep wells and plenty of colour. ...

Wikipedia Word definitions in Wikipedia
An ice cube is a small, roughly cube -shaped piece of ice (frozen water), conventionally used to cool beverages . Ice cubes are sometimes preferred over crushed ice because they melt more slowly; they are standard in mixed drinks that call for ice, in which ...

Wiktionary Word definitions in Wiktionary
alt. 1 (&lit ice cube English) 2 Any small piece of ice used for cooling drinks, larger than crushed ice, regardless of their shape. n. 1 (&lit ice cube English) 2 Any small piece of ice used for cooling drinks, larger than crushed ice, regardless of their ...

WordNet Word definitions in WordNet
n. a small cube of artificial ice; used for cooling drinks