Local schools districts are urging patrons who received meals from the districts late last week to throw out milk products after Hiland Dairy recalled chocolate milk produced at its Norman plant. Hiland Dairy recalled the one-half pint 1% low fat chocolate milk produced at its Norman facility because some of the chocolate milk may contain food-grade sanitizers, which could make someone sick if they drank it. While only eight cases, or 400 individual milk containers, were affected by the contamination, the company recalled all the half-pints of chocolate milk produced on that date — a total of 240,000 milk containers.