Packaging and reach

Two technologies that needed each other

Cheap bottles were useless without a reliable closure, and reliable closures were useless without cheap bottles. That is why packaged beer becomes a mass market around the turn of the twentieth century rather than whenever either component first appeared.

Machine bottle production made glass uniform as well as cheap, and uniformity is what allows mechanical filling. William Painter’s crown cork, patented in 1892, is the other half: stamped from sheet metal, applied in one motion, sealing reliably against internal pressure, and costing almost nothing. It displaced wired corks and swing stoppers within a generation and has barely changed since.

Pasteurisation bought shelf life, and charged for it

Packaged beer is alive unless something is done about it. Heat treatment — beer held briefly at around 60 °C — gives a shelf life measured in months instead of weeks, and that is the precondition for national distribution, export and supermarket retail.

The cost is real: heat leaves a slight cooked note, flattens hop aroma and speeds staling. Which is why the technique was never universal. Cask ale cannot be pasteurised and remain cask ale, Czech tank beer is sold precisely on not being pasteurised, and a great deal of modern beer is sterile-filtered or simply kept cold instead. It is a distribution technology, and breweries without a distribution problem skip it.

The can, and its fifty-year reputation problem

Canned beer went on sale in 1935, once a lining had been developed that could survive carbonated, mildly acidic liquid without corroding or tainting it. On the physical measures that matter to beer the can was immediately better than glass: completely opaque, so no lightstruck flavour; lighter; unbreakable; less headspace oxygen.

It nonetheless spent five decades regarded as the cheap option, because cheap beer arrived in it first. The craft sector’s move to cans from around 2010 reversed the association by pointing at exactly the properties that had been true since 1935 — the same technology adopted twice, for opposite reasons.

What packaging did to the pub

The second-order effects are the larger ones. Beer that can be bought and kept at home competes with beer drunk in a licensed house, and the long decline of the pub as the default place to drink begins here rather than with anything about pubs.

National distribution also makes national brands possible, and national brands make advertising worthwhile, and both favour producers large enough to fill a bottling line. The consolidation of the mid-twentieth century is downstream of a bottle cap.

It also changed what beer had to be. A cask sold three streets from the brewery can be alive, variable and short-lived, because the licensee will get through it and can judge it by eye. A bottle sold four hundred miles away six months later can be none of those things — it has to be stable, filtered or pasteurised, and identical to the last one. Consistency stopped being a virtue a brewery could aspire to and became a condition of selling at all, and much of what the craft sector later rebelled against is the taste of that requirement being met.