Caffeinated Concentration

You cause an empty cup you are holding to be instantly filled with a hot, caffeinated beverage of your preference. After spending the casting time consuming the drink, you feel better able to concentrate on the task at hand. 

For the next hour, you may add 1d4 to a single skill check. This may be added after the check is rolled, but before the DM states whether the check succeeded or not. The spell's dice type increases to 1d6 at 5th level, 1d8 at 11th, and 1d12 at 17th.