Best res option for bucket system

Hey I was building myself an experimental system and I hadn't thought much about the res, I was just gonna get a 55gal rubbermaid BRUTE. They are 60 bucks and come in cool colors.

So the res will only be supplying 4 sites to begin with, but I might end up using it as a replacement for 12 sites. That's why I was lookin at 55 gals, but I could live with 50 gallons.

Anyways, I can't figure out if the rubbermaids are food grade and BPA free, I dont think they are.

can anyone suggest a food grade bpa free res for me?

anyone have any input on this?
Ive seen pleanty of growers using the rubbermaid cans'
so I'll prob just get one.......

http://www.drinksforum.com/winemaking/rubbermaid-brute-plastic-containers-9610-.htm

BPA is food grade, I thought it was mostly used in clear plastics (I would have no idea though). After googling it I see the alternatives may be no better.

- Jiji

Grey is good. I've been using one for years. http://www.rubbermaidcommercial.com/rcp/products/detail.jsp?categoryCode=waste&subCategoryCode=waste_brute_utility&rcpNum=2632&categoryCode_subCategoryCode_rcpNum=waste_waste_brute_utility_2632