Regardless of the variation in the shape of Beaker pottery, it is usually easily recognizable. It's decoration says "I'm a beaker".
In graphic A you have a media - coffee cups. Most have the same fabric and the same shape.
In graphic B you have a message - Coca-Cola, which is a cultural phenomenon that can appear on any media, including a coffee cup, as in graphic A.
In some ways Beaker is like Coca-Cola. It's the projection of an identity and social value that extends beyond the beverage. Also, like Coke, the medium is not too important, even for the drink containers which vary. But Coke's message is conveyed through the coloration (red background - white message) and a certain stylistic motif (cursive coca-cola). Idealic people smile and hold a coke suggesting that you should as well.
Here's various forms of Beaker pottery from around Europe over a thousand years. In order to be honest, I chose some of the weirder ones, including a few very late ones. I also excluded a few of the marginal for simplicity. Without getting too wrapped up in the selection, I think the point is still fairly easy to see. Most of the Beakers appear to have been reddish with white encrustation on many with very similar, repetitive motifs.
The interpretation of the message is another subject. Many beakers will have an abstract motif that is somewhat reminiscent of the tartans depicted in anthromorphic figures of the Iberian Early Chalcolithic**. Like Borderlander Tartans, these may reflect tribal differences or clan descent. (This had been previously hypothesized for anthromorphic slate plaques in funerary arrangements)
Beakers also tend to have banding, either cord, herringbone, plain grooves or acacia* (IMO*). Like Sherratt, I've thought that this indicates the principle bittering adjunct to the beverage. [here] Also, many beakers feature a solar emblem on the bottom, which is unfortunately rarely photographed. This is significant given the burial position of those buried with them. In fact, the triangular patterns may sometimes depict a sort of 'blazing', although the abstracting makes it difficult to know for sure.
The techniques used to style the beakers is another interesting story to cover later.
**pre-Beaker. Also, similar motifs can be found on the dress of anthromorphic stelae from the EBA in various places.