In Australia, it’s not uncommon to be invited to a barbecue, picnic, or party where the host says “BYO” — short for “bring your own” alcohol. This tradition stems from a mix of cultural norms, cost-sharing, and the relaxed, casual nature of Aussie gatherings. Alcohol in Australia can be expensive, and many hosts prefer guests bring their preferred drinks rather than stocking a wide range. It also ensures everyone gets exactly what they like, whether it’s beer, wine, cider, or spirits. Some venues, like certain restaurants or community halls, are BYO because they don’t hold a liquor licence — in those cases, you can bring your own bottle, often for a small corkage fee. Understanding the BYO culture can help you fit right in and avoid arriving empty-handed.