Question about reservoirs and the drip hydro system...

I recently bought a Power Grower Eco system, its a drip hydro system and im thinking about buying a few more. It looks like this

http://www.hydroponics-garden.com/power-grower-eco.html

i didnt realize that id have to hook it up to a reservoir because i figured the water held at the bottom of the system would be enough.. i am very foolish sometimes...it has that blue hose on the side of it that is meant to hook up to a reservoir but all i need to know now is how to go about making one, can i just buy a rubbermade tub and drill a hole on the bottom-side of it and connect the the hose from the drip system to it? or will that flood the drip system to much??:peace:
 
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