The process for packaging "cask wine" (boxed wine) was invented by
Thomas Angove, a winemaker from
Renmark,
South Australia, and patented by his company on April 20, 1964. Polyethylene bladders of one
gallon (4.5 litres) were placed in
corrugated boxes for retail sale. The original design required that the consumer cut the corner off the bladder, pour out the serving of wine, and then reseal it with a special peg. This design was based on a product already on the market, a bag in a box used by mechanics to hold and transport battery acid. In 1967, Australian inventor
Charles Malpas and Penfolds Wines patented a plastic, air-tight
tap welded to a metallised bladder, making storage more convenient. Modern wine casks use plastic taps which can be exposed by tearing away a
perforated panel on the box. For the following decades, bag-in-box packaging was primarily preferred by producers of less expensive wines, as they were cheaper to produce and distribute than glass
flagons, which served a similar market. In Australia, due to the difference in how wine is taxed compared to other alcoholic beverages, boxed wine is often the least expensive form of drinkable alcohol. A 4-
litre cask of at least 9.5% alcohol can often be found for around . These attributes have led to boxed wine being widely available throughout Australia and holding a prominent place in Australian pop culture. During the mid-1970s, the bag-in-box packaging concept expanded to other beverages, including spring waters, orange juices, and wine coolers. In 2003, California
Central Coast AVA-based Black Box Wines introduced mass premium wines in a box. Within the decade, premium wineries and bottlers began packaging their own high-quality boxed wine. This, coupled with an increased cultural interest in
environmentally sustainable packaging has cultivated growing popularity with affluent wine consumers. == Attributes ==