Tax dodgers should be "named and shamed", a spending watchdog has warned, to discourage the rich and famous from exploiting legal loopholes to avoid paying billions to the Treasury.
It called for a public list of of promoters who use their schemes.
Last year comedian Jimmy Carr apologised after it emerged he used a complex scheme to reduce his tax bill.
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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.