You shouldn't need more than 1. I thought i would need 2 to fill mine, but only used 1/2. the pump itself is inside that reservoir, so it takes less than you think.
Done:H&R Sport Springs Koni STR Shocks & Struts, Lower Control arms, FCABs, OFHG, CCV, Cooling Sytem refresh, Coolantsnitch. Yet to do:Transmission fluid & filter, VCG