If a retail store's 5-, 6-, 7-gallon plastic buckets are made from HDPE (high density polyethylene), will they be safe for storing flour, sugar, honey, etc., and for growing vegetables such as tomatoes? Or, would buckets made from other kinds of plastics such as PET, PETE, or PP be safer for food storage? While shopping on the Internet, manufacturers' literature's for HDPE buckets say the items "meets FDA requirements." What exactly are the FDA's requirements with regards to HDPE-made buckets? I have asked a manufacturer, and searched the FDA's Web site http://www.fda.gov/default.htm for an explanation without success.