Billionaire hedge fund manager Bill Ackman shared these details this week in a podcast called Equity Mates Investing, recalling a dinner where Buffett politely declined both still and sparkling water, claiming he had not touched the beverage in nearly five decades. Warren Buffett's unusual beverage preference has resurfaced after billionaire investor Bill Ackman recalled an extraordinary exchange at a dinner. Buffett reportedly told him he had not consumed.