Invigoration Draught is a potion which presumably boosts the drinker's energy. Harry Potter had to make some during a fifth-year Potions lesson. He did better than he usually did in the class and felt secure that his correctly-brewed potion would manage to finally earn him an "E." However, the vialed sample he handed in at the end of the lesson somehow ended up broken, and Professor Snape still managed to give him zero marks, however, by dropping Harry's flask of potion on the floor when Harry wasn't looking, so he couldn't test it.