A very expensive 1x1 fluid storage tank that can hold an unlimited amount of fluid. ***VERY IMPORTANT*** You MUST put a pump to output fluid, otherwise no fluid will come out. The tank costs as much as 100 regular fluid storage tanks (2000 iron plates and 500 steel plates) OR you can make it directly using 100 fluid tanks. Either way, it takes a LONG time to craft.
Mods introducing new content into the game.