Mueller: “Cooling The World’s Milk”. For more than 70 years, Mueller has been a very successful player in the market of storage and cooling of liquids. As a world renowned supplier of milk cooling tanks, Mueller has been particularly successful in the dairy industry. In Vietnam, Mueller Asia is an active supplier of the best milk cooling tanks to dairy farms and milk collection points all over the country since 2014. Mueller Asia Co Ltd is 100% foreign direct investment from Mueller BV in the Netherlands. Mueller Asia and Mueller BV are part of the Paul Mueller Company.