só falando do assunto de data de validade: tinha lido pelo twitter do edurecomenda num caso distinto desse que as cervejas nos eua não tem obrigação de por prazo de validade, ai eu fiquei curioso, pq é meio oq eu vinha falando aqui, então vou deixar dois trechos de uma googlada rápida que eu fiz que achei interessante (mesmo não tendo muito a ver com o assunto, tem a ver)
"Freshness date
A freshness date is the date used in the American brewing industry to indicate either the date the beer was bottled or the date before which the beer should be consumed.
Beer is perishable. It can be affected by light, air, or the action of bacteria. Although beer is not legally mandated in the USA to have a shelf life, freshness dates serve much the same purpose and is used as a marketing tool.
Beginnings of freshness dating
General Brewing Company of San Francisco marketed their Lucky Lager Beer as "Age Dated" as early as late 1935.[13] They stamped a date on each can lid to indicate that the beer was brewed before that date. This was not to insure that the beer was "fresh" but to insure that it had been aged properly. So many breweries had rushed beer to market before it was ready when Prohibition ended, that customers were wary of getting "green" beer. The Boston Beer Company, maker of Samuel Adams, was among the first contemporary brewers to start adding freshness dates to their product line in 1985. For ten years there was a slow growth in brewers adding freshness dates to their beer. The practice rapidly grew in popularity after the Anheuser-Busch company's heavily marketed "Born-On dates" starting in 1996. Many other brewers have started adding freshness dates to their products, but there is no standard for what the date means. For some companies, the date on the bottle or can will be the date that the beer was bottled; others have the date by which the beer should be consumed."
fonte:
en.wikipedia.org/wiki/Shelf_life
e outro link sobre um cara que reune informações das desconexas info das cervejas americanas
beerdates.com/faq