It's blue top actually. Dating from an era when it was believed milk consumption on the bike was essential to get the proteins ingested correctly.
I take it the era in question was this one: Ian Rush, Accrington Stanley Milk Advert, CLEAN AND IN FULL! - YouTube
@Theeb started
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I take it the era in question was this one:
Ian Rush, Accrington Stanley Milk Advert, CLEAN AND IN FULL! - YouTube