Karl Lagerfeld doesn’t just have two personal maids tending to his Siamese cat, Choupette — he also requires a butler to follow him around at parties with a goblet of Pepsi Max on a silver tray.

At Lagerfeld and Chanel’s launch of his exhibition “The Little Black Jacket” at the Swiss Institute Wednesday, the ponytailed potentate was tailed by a staffer from catering company Olivier Cheng, whose sole task was holding a silver tray with one full glass of Pepsi Max in case The Kaiser found himself dehydrated.

The soda serf stood dutifully nearby a revolving ring of photographers and admirers around Lagerfeld, including Lily Collins, in case the design divo wanted a sip — but he never touched the stuff.

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Lagerfeld’s 9-month-old cat also made headlines this week when the designer revealed his fancy furball uses an iPad, eats at the dinner table with him and has two maids keeping a diary of the kitty’s activities when he’s not around.

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