Walmart is among McCormick's biggest customers, according to the spice maker's financial reports, and the company's products are sold at major grocery chains including U.S.-based Kroger Co KR.N and U.K.-based Tesco PLC.TSCO.L Kurzius said he would not talk about specific customers. Retailers including WalmartWMT.N, the world's largest, have said that they are concerned about further price increases from consumer products companies, after largely passing them on following once-in-a-generation levels of inflation. McCormick is revamping its packaging to help its signature spices stay fresher longer, an upgrade that can make the hikes more palatable, he added.