The first thing to consider when deciding what size bottle your brewery should use to package beer is where you plan to supply the beer. For example, if you are a local brewer and have your own pub, you can opt for longnecks. As you will be serving the beer directly to customers, longnecks small and portable size makes for an acceptable and practical choice. However, if you are a bulk-supplier who sells beer to bar owners and other such establishments, you might want to go for a bigger bottle like a Growler.