Carmen, Baby (1967)
Mentioned in relation to director Radley Metzger.
woman sets corked champagne bottle down in front of her (like Carmen) then she grinds into it until the cork pops inside her
The scene where Sylvia is doing the Hokey Pokey and squats down on a water bottle -- in "Carmen, Baby", Carmen is dancing on a table at a party and squats down onto a tall bottle, much to the delight of most of the other party goers. Knowing Waters as a fan of Radley Metzger, this can't be coincidental.