<P> A beer bottle is a bottle designed as a container for beer . Such designs vary greatly in size and shape, but the glass commonly is brown or green to reduce spoilage from light, especially ultraviolet . </P> <P> The most widely established alternatives to glass containers for beer in retail sales are beverage cans and aluminum bottles; for larger volumes kegs are in common use . </P> <P> Bottling lines are production lines that fill beer into bottles on a large scale . </P> <P> The process is typically as follows: 1) Filling a bottle in a filling machine (filler) typically involves drawing beer from a holding tank 2) Capping the bottle, labeling it and 3) Packing the bottles into cases or cartons . Many smaller breweries send their bulk beer to large facilities for contract bottling--though some will bottle by hand . </P>

Why are beer bottles shaped the way they are