According to Emily Post, napkins may only be used to cover laps, clean up spills, or signal the waiter via semaphore that your table has hit an iceberg. Master restaurant etiquette over a gourmet meal with today's Groupon : for $18, you get two 375-milliliter bottles of flavor-infused olive oil at New Orleans Olive Oil Company, located inside the French Market Farmers’ Market (a $36 in-store value).

The olive-oil experts at New Orleans Olive Oil Company showcase premium extra-virgin olive oil imported from Italy and infused with one of 12 robust flavors. Knowledgeable staff can help patrons select two bottles from five rotating specialties and seven standby flavors to enhance meals or reward hard-working car engines with discriminating palates. The bacon and sun-dried-tomato varieties bolster a flat muffaletta, while the blood-orange permutation spruces up salad dressings with a note of citrus. Shoppers can add aroma to dishes with bottles of zesty onion- or roasted-garlic-infused oil. The salt-free infusions blend smoothly with recipes and may improve heart health when consumed in moderation or used to fill swimming pools for cardio exercise.