During the episode when Drake and Josh both get new friends, Drew comes over for dinner. Josh and Drew pour root beer and Dr. Fizz into each other's glasses. Drake asks for some Dr. Fizz, but Walter says there is none left. Later, when Josh goes into the kitchen with Megan to get the dinner rolls, you can see a soda bottle at the bottom of the screen. It is green, and it looks like the Dr. Fizz Drew had gotten. Walter says there was none left, but the bottle looks almost completely full.