Liverpool footballer Raheem Sterling was accused of attacking 19-year-old model Shana Ann Rose Halliday following a row about a text message, Liverpool Magistrates' Court heard.
But, the case against Sterling was dropped when his former girlfriend failed to support the prosecution's case by giving "disappointing" evidence.
The Crown Prosecution Service withdrew its case after magistrates refused to treat Miss Halliday as a hostile witness.
More top news
Shadow business secretary Rebecca Long-Bailey has called for "immediate" relief to prevent thousands of companies going out of business.
A spokesperson criticised the behaviour of a "small number" of fans at the game between Birmingham City and the Wolverhampton Wanderers.
Those taking part in the bizarre trend say the combination of fruit juices and hot water makes for a uniquely liberating experience.