Most countries in the world use auxiliary materials for beer production, with the exception of Germany, which strictly abides by its "Beer Pure Brewing Law" formulated in 1516. Only four ingredients, water, malt, hops and yeast, are allowed in beer brewing, and no auxiliary ingredients are allowed.

If you drink beer frequently, you will definitely find that beer has different packaging methods, some are filled with green or brown glass bottles, some are filled with metal cans, and there are keg beer filled with metal vats. The beer consumed in these three ways is not much different in terms of the beer itself, but different packaging methods will have some minor effects on the beer.

Water, hops, malt and yeast, in people's common sense, these four raw materials are indispensable to the composition of beer, but in fact, these are only applicable to a certain region of Germany beer purity law for industrial beer standards. In fact, there is no valid rule that beer must use any of these four ingredients. Beer is traditionally an alcoholic drink made from wheat malt, hops and biologically fermented.