Too much speculation and opinion to be factual. Let’s move this to IMHO (from FQ).
In a frictionless vacuum?
What I find amusing about the movie (the Gene Wilder version anyway) is that Wonka never explicitly says their flavor lasts forever, just that they never get any smaller. They could just as well be painted rocks.
WONKA: That’s right. For children with very little pocket money. You can suck 'em forever.
…
WONKA: Fantastic invention. Revolutionize the industry. You can suck 'em and suck 'em and suck 'em, and they’ll never get any smaller. Never. At least I don’t think they do. A few more tests.
Speak for yourself. I’m getting my quarter’s worth.
Snozzberry?! Who’s ever heard of a snozzberry?
That’s what I was remembering from the Gene Wilder movie, as well. It looked like a couple star-shaped chunks of hard candy that were mashed together to make sure the pointy parts would be sure to injure a mouth.
I also remember someone started making and distributing an “Everlasting Gobstopper” and seeing them in the candy aisle of the local 7-Elevens. They were clearly marketed on the heels of the television re-release of the Gene Wilder version and were vastly popular for a few months. But they weren’t the pointy mouth-manglers from the movie, instead they were sugary spheres – what the British and Canadians called Gobstoppers and USA residents call Jaw-Breakers – made of many different-colored layers of tasteless sugar. I remember getting two of them, finishing one, and thinking “Yep. The other one won’t get any smaller, because I’m not even going to bother unwrapping it!”
–G!
And Sammy Davis Jr. made a remarkable hit with his cover of “The Candy Man”
Well, not with that attitude.
Hey, they’re the one who won’t hold still.
Oh you guys are killin’ me. 
Or you’d turn into a blueberry.
I have, but if The BFG was accurate, they’re not very pleasant.