Freeze-drying the mixture wouldn't work because it would come out as a clumpy, cakelike substance.

FORBES: The Impossible Made Possible

The difference now is that the process is becoming slightly more clumpy: successful Americans are sticking together more than they used to.

ECONOMIST: America's great sorting out

Critics dubbed the phenomenon "Roller-mania" as screaming fans, mostly teenage girls, copied the group's trademark tartan-fringed shirts and trousers and clumpy shoes.

BBC: Ex-Rollers' boss faces abuse claims