Accountant supermarket manager canada med store The first was Caitlin Freeman, pastry chef for Blue Bottle Coffee Co. in San Francisco. Inspired by conceptual artist Buckminster Fuller’s “Proposed Tetrahedral City” — an enormous floating pyramid meant to provide housing for thousands in San Fransisco Bay — she crafted a pyramid-shaped marshmallow floating on hot chocolate, sprinkled with salt crystals harvested from the bay itself.