Folgers Dark Black Silk Keurig Genuine K Cup Pods Coffee 0.282 Ounce 32 Count Brookshire's The Citadel Drinkware Academy Commemoratives, LLC Restpresso 4 oz Black Paper Coffee Cup Ripple Wall 2 1 2" x 2 1 2" x 2 1 4" 500 count box We heard that caffeine content can vary by brew method. Here's what we discovered about the amount of caffeine in drip coffee, French press coffee, Keurig K Cups and more.