A personal vaporizer has a hollow tube that extends from an atomizer through a tank for holding vaporization media. The hollow tube has a filling hole formed through a side wall thereof. To fill the tank, vaporization media can be injected into a mouthpiece and flows into the hollow tube. A divider wall in the hollow tube deflects vaporization media through the filling hole and into the tank. After the tank is filled with vaporization media, vaporizer is moved to an assembled configuration in which the filling hole is blocked.