Rheingold Beer?
When Gidget and Kahuna are in the beach house, they drink Rheingold Beer. It might be product placement, though the can labels seem deliberately concealed while they're drinking it. Rheingold was a New York City brand, and not usually seen outside the New York area. I wonder why the brand was chosen? I suppose it might have been available on the west coast for transplanted New Yorkers, but not something I'd expect to see in a movie with a California setting.