Add some types of tanks, which can be combined vertically. Tanks can hold Fluids and Potions.
7 tanks from this mod. From the left, Wood, Stone, Iron, Gold, Diamond, Emerald, Star tank. The right one has more capacity.
This picture shows how the tanks store Fluids and Potions.
Each tank can hold almost all kind of fluids. They can be connected vertically, so the right tank tower can hold about 7 billion mB of fluids.