Most of us are used to shelling out as much as $2 for their morning cup o' joe, but at some places, that price will only get you a lump of sugar. While most cafes stick to your basic drip coffee, high-end shops around the country have perfected the art of brewing though various single-cup methods including the pricy Clover coffeemaker and the laboratory-style siphon system, also called vacuum or vac pot, which involves various glass bowls, water vapors and suction. Sound complicated? It is, which is why some brews cost as much as $18 per single order. What’s the most expensive cup of coffee you've ever had? Let us know in the comments.