Artificial sweeteners in diet sodas begin to chemically break down over time and the diet soda will actually taste worse the further away you get from the eat by date (plus being flat).

There are, of course, certain health risks associated with spoiled drinks so always remember to practice food safety and enjoy your drinks before their shelf life has expired!

It was the 1962 typeface change that visually separated Pepsi-Cola from Coca-Cola, which until then had shared a swashy, Spencerian script, at least in the uppercase letters.

Pepsi’s clean, modern look was in sync with 1960s design, in which sans-serif type was acquiring huge popularity, and for a time it left Coca-Cola’s 19th-century logo looking rather old.

It conveys no energy, no motion, no effervescence, and, well, . The name has the strength of aural alliteration, too; Coca-Cola’s repetitive, hard “c” sound is visually expressed in the flowing loops.

Its styling cues — the round letters, the wavy e, the swashy circle — will please Pepsi insiders, and consumers will recognize it, but that’s the end of the good news. By disconnecting it from the type and floating it in space, it becomes a singular design element that must stand on its own, which it really cannot do.

That said, had I been on Pepsi’s board, I would have given the new design a thumbs down. Back to Coke Before I leave the topic, it may be instructive to look again at Coca-Cola’s logotype, which is everything Pepsi’s is not . Circular letters are vigorous and rhythmic, and those swashy Cs have exuberant, carefree flair.

It’s technically adequate (if unimaginative), but the sum of its parts, as many of you pointed out, is static, empty, vaguely bland. Pepsi’s circle and name used to interact — one overlaid the other or was contained within it . Thick-to-thin strokes are visually engaging and fast, because the eye follows converging lines.

Although not a perfect test, your senses are usually the most reliable instruments to tell if your soda has gone bad.

The first thing to go bad with any soft drink is the loss of CO2 (the carbon dioxide which makes the soda fizz when you pour a glass).

Pepsi’s makeover and high-octane advertising paid dividends in sales. The single stroke weight is mechanical, meaning it required machines to draw it, so it lacks the warmth of a human hand.