SToK Caffeinated Black Coffee Shots, 264-Count Single-Serve Packages for $14.55 shipped after selecting Subscribe & Save to take an additional 5% off and get free shipping. Here is a screenshot for reference. The subscription can be canceled at any time with a few quick clicks with no obligation. ToK Caffeinated Black Coffee Shots delivers 40 Mg of caffeine per serving, which is equivalent to a shot of espresso. It comes in a creamer-like container for portion control.