A bottle shop in Castlecrag is shop which sells alcoholic drinks. You may hear some people refer to a bottle shop as a liquor store or a beer store.
Bottle shops in Castlecrag tend to vary in what they have in stock. Many bottle shops will provide a large range of very popular beers and wines, however there are many stores which focus on boutique beers and wines for the wine and beer connoisseur. Many stores also provide a range of non-alcoholic options for people who prefer not to consume alcohol or who would like to reduce their alcohol consumption.
Legally in Australia you must be over 18 to buy alcohol from a Castlecrag bottle shop. The laws do vary across Australia, however. In NSW, alcohol may be sold to a person under the age of 18 as long as they are accompanied by a guardian who is over the age of 18 and are eating a meal with their drink.
In Australia most supermarkets tend to sell alcoholic beverages in separate bottle shops which are adjacent to the grocery store. Different states differ in their laws as to whether alcohol can be sold in the supermarket or not. In NSW it is permitted whereas in Victoria it is not permitted.
At a bottle store there are a few ways you can save money. In many larger Castlecrag liquor stores, there are usually wines and beers on special each week. Some bottle shops also offer a discount if you buy more than a 6 pack, so watch out for bargains!