Trololol, but I'll pretend you're asking a serious question.
Lowe's sells 5-gallon food-grade buckets.
http://www.lowes.com/pd_356492-1152-50640_0__?productId=3694238 Call ahead to make sure they have them in stock.
Costco has a selection of emergency preparedness supplies, but I don't know how much of them they actually keep in stock in their warehouse locations.
http://www.costco.com/emergency-kits-supplies.html
Also, they treat their employees a hell of a lot better than Walmart treats theirs.