Maple Wainut Topping. Handtlmg o This product is hand-filled water-activity controlled. After the jars were filled with the product, they were capped. An operator transferred the open jar to a cart. transferring the jars, his hands in a sanitizing solution, Since the jars were open residual water dripped from the operator's hands into the product. This could have been caused for product contamination as well as a possible source for localized water spots in a water-activity controlled product.