Is a stubby or a premixed bottle of spirit-based drink one standard drink?

Yes, both a stubby (typically a 330ml beer) and a premixed bottle of spirit-based drink (often around 375ml) can be considered one standard drink, depending on their alcohol content. In many countries, a standard drink is defined as containing approximately 10 grams of pure alcohol. However, it's essential to check the specific alcohol by volume (ABV) of each drink, as it can vary significantly between products. Always refer to local guidelines for precise definitions.