This 250 ml PE-LD spray bottle can be filled with the coolant you want in your system. By pumping, or squeezing the bottle, the liquid is pushed through a tube directly into the expansion tank. Conversely, it is also possible to suck the liquid out by pumping the bottle. This is particularly advantageous during modifications or when dismantling the water cooling system, as it prevents messy spills. The package also includes a cap to seal the spray bottle with the liquid.